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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" /> <link rel="icon" href="../../static/img/favicon.gif" /> <title> Jeff Miller's postage stamps - MacTutor History of Mathematics </title>  <link rel="stylesheet" href="../../static/css/bootstrap.min.css?h=8de02d92" />  <link rel="stylesheet" href="../../static/css/lato.css?h=cc1e7b16" /> <link rel="stylesheet" href="../../static/css/reset.css?h=d363f773" /> <link rel="stylesheet" href="../../static/css/custom.css?h=af6c60f9" /> <link rel="stylesheet" href="../../static/css/site.css?h=009079dc" /> <link rel="stylesheet" href="../../static/css/content.css?h=469c9b2b" /> <link rel="stylesheet" href="../../static/katex/katex.min.css?h=607b2673" /> <link rel="stylesheet" href="../../static/css/tooltip.css?h=8bb1ae34" /> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" />  <link id="new-theme-style" rel="stylesheet" />  <noscript> <style> .nonoscript { display: none; } </style> </noscript>  <meta property="og:title" content="Jeff Miller's postage stamps" /> <meta property="og:site_name" content="Maths History" /> <meta property="og:locale" content="en_GB" /> <meta property="og:url" content="https://mathshistory.st-andrews.ac.uk/Miller/stamps/" />  <meta name="twitter:card" content="summary" /> <meta name="twitter:site" content="Maths History" /> <meta name="twitter:title" content="Jeff Miller's postage stamps" /> </head> <body> <div class="container">   <header class="site-header py-3 position-relative">  <a class="skip-link" href="#main">Skip to content</a> <div class="row flex-nowrap justify-content-between align-items-center"> <div class="col pt-1"> <a class="site-header-name text-decoration-none" href="../../" > <h1 class="site-header-name"> <img height="48" src="../../static/img/logo.png" alt="MacTutor logo" /> MacTutor </h1> </a> </div> </div>  </header>   <div class="container nav-bar" role="navigation"> <div class="row nav"> <a class="col-md-auto p-2" href="../../">Home</a> <a class="col-md-auto p-2" href="../../Biographies/">Biographies</a> <a class="col-md-auto p-2" href="../../HistTopics/">History Topics</a> <a class="col-md-auto p-2" href="../../Map/">Map</a> <a class="col-md-auto p-2" href="../../Curves/">Curves</a> <a class="col-md-auto p-2" href="../../Search/">Search</a> </div> </div>   <main id="main"> <div class="row"> <div class="col-md-12"> <div class="row"> <div class="col-md-12"> <h1>Jeff Miller's postage stamps</h1> </div> </div> <div class="row"> <div class="col-md-12"><main style="color: rgb(165, 42, 42); background-color: rgb(255, 255, 225); margin:0;"> This page was founded by Jeff Miller (details at <a href="#details">THIS LINK</a>) and has since been added to and integrated into MacTutor. <hr style="border:1px solid;"/> You can see thumbnails of ALL the mathematician stamps at <a href="../thumbs/">THIS LINK</a> (Be patient -- there are nearly 1600 stamps!) <hr style="border:1px solid;"/> You can see these stamps ordered by their country of issue at <a href="../stamps_countries/">THIS LINK</a>. A page of "early stamps" (up to 1970) of mathematicians is at <a href="../early_stamps/">THIS LINK</a>. Some stamps which have been classified as illegal are at <a href="../illegalthumbs/">THIS LINK</a>. We also have a page of more than 500 OTHER MATHEMATICAL STAMPS at <a href="../other_stamps/">THIS LINK</a>. We have a page of more than 300 PERSONALLY DESIGNED STAMPS of mathematicians at <a href="../stamps_extra/">THIS LINK</a>. These stamps were not officially issued by the country's postal services, but could be used to send letters. We have a page of stamps from the mythical country of MATHEMATICA at <a href="../Mathematica_stamps/">THIS LINK</a>. <hr style="border:1px solid;"/> Click on Ⓑ to access the biography and on Ⓣ to see the thumbnails of that mathematician. <a id="top"></a><h4 style="color: rgb(165, 42, 42);"> Jump to section: <a href="#Babbage">B</a> <a href="#Caraca">C</a> <a href="#DAlembert">D</a> <a href="#Eckert_John">E</a> <a href="#Faraday">F</a> <a href="#Galileo">G</a> <a href="#Hadamard">H</a> <a href="#Ionescu">I</a> <a href="#La_Condamine">L</a> <a href="#Maric-Einstein">M</a> <a href="#Napier">N</a> <a href="#Obreshkov">O</a> <a href="#Pacioli">P</a> <a href="#Ramanujan">R</a> <a href="#Schmidt_Otto">S</a> <a href="#Teixeira">T</a> <a href="#Ulugh_Beg">U</a> <a href="#Watt">W</a> </h4> <a id="Abbe">ABBE, Ernst </a><a class="mlink" data-popup="../../Biographies/Abbe/popup/" href="../../Biographies/Abbe/">Ⓑ</a> <a href="../Store/abbe.html" target="_blank">Ⓣ</a> Issued by Germany in 1921 (an emergency banknote) <a href="../images/abbe3.jpg" target="_blank">abbe3</a> Issued by German Democratic Republic in 1956 <a href="../images/abbe1.jpg" target="_blank">abbe1</a> Issued by German Democratic Republic in 1989 <a href="../images/abbe2.jpg" target="_blank">abbe2</a> <a id="Abdullayey">ABDULLAYEV, Hasan </a><a href="../Store/abdullayey.html" target="_blank">Ⓣ</a> Issued by Azerbaijan in 2008 <a href="../images/abdullayev2.jpg" target="_blank">abdullayev2</a> Issued by Azerbaijan in 2018 <a href="../images/abdullayev.jpg" target="_blank">abdullayev</a> <a id="Abel"></a>ABEL, Niels Henrik <a class="mlink" data-popup="../../Biographies/Abel/popup/" href="../../Biographies/Abel/">Ⓑ</a> <a href="../Store/abel.html" target="_blank">Ⓣ</a> Issued by Norway in 1929, upon the centenary of his death <a href="../images/abel1.jpg" target="_blank">abel1</a> <a href="../images/abel2.jpg" target="_blank">abel2</a> <a href="../images/abel3.jpg" target="_blank">abel3</a> <a href="../images/abel4.jpg" target="_blank">abel4</a> Issued by Norway in 1966 (a banknote) <a href="../images/abel11.jpg" target="_blank">abel11</a> Issued by Norway in 1978 (a banknote) <a href="../images/abel12.jpg" target="_blank">abel12</a> Issued by Norway in 1983, showing the Abel monument by Gustav Vigeland <a href="../images/abel10.jpg" target="_blank">abel10</a> Issued by Norway in 2002, on the two-hundredth anniversary of his birth <a href="../images/abel5.jpg" target="_blank">abel5</a> <a href="../images/abel6.jpg" target="_blank">abel6</a> <a href="../images/abel7.jpg" target="_blank">abel7</a> (a coin) <a id="Agnesi"></a>AGNESI, Maria Gaetana <a class="mlink" data-popup="../../Biographies/Agnesi/popup/" href="../../Biographies/Agnesi/">Ⓑ</a> <a href="../Store/agnesi.html" target="_blank">Ⓣ</a> Issued by Italy in 2018, to celebrate International Women's Day <a href="../images/agnesi.jpg" target="_blank">agnesi</a> Issued by Vatican City in 2018 <a href="../images/agnesi2.jpg" target="_blank">agnesi2</a> <a id="Airy"></a>AIRY, George B <a class="mlink" data-popup="../../Biographies/Airy/popup/" href="../../Biographies/Airy/">Ⓑ</a> <a href="../Store/airy.html" target="_blank">Ⓣ</a> Issued by Great Britain in 1984 <a href="../images/airy2.jpg" target="_blank">airy2</a> Issued by Tonga in 1984 <a href="../images/airy3.jpg" target="_blank">airy3</a> Issued by Nicaragua in 1994, as part of a series depicting astronomers <a href="../images/airy.jpg" target="_blank">airy</a> <a id="Al-Biruni"></a>AL-BIRUNI, Abu Arrayhan Ibn Ahmad <a class="mlink" data-popup="../../Biographies/Al-Biruni/popup/" href="../../Biographies/Al-Biruni/">Ⓑ</a> <a href="../Store/al_biruni.html" target="_blank">Ⓣ</a> Issued by Afghanistan in 1973 <a href="../images/al-biruni5.jpg" target="_blank">al-biruni5</a> Issued by Iran in 1973 <a href="../images/al-biruni6.jpg" target="_blank">al-biruni6</a> Issued by Pakistan in 1973 <a href="../images/al-biruni3.jpg" target="_blank">al-biruni3</a> <a href="../images/al-biruni4.jpg" target="_blank">al-biruni4</a> Issued by Soviet Union in 1973 <a href="../images/al-biruni7.jpg" target="_blank">al-biruni7</a> Issued by Syria in 1973 <a href="../images/al-biruni.jpg" target="_blank">al-biruni</a> Issued by Turkey in 1973 <a href="../images/al-biruni8.jpg" target="_blank">al-biruni8</a> Issued by Algeria in 1974, depicting silk thread writings by Al-Biruni <a href="../images/al-biruni9.jpg" target="_blank">al-biruni9</a> Issued by Egypt in 1975 <a href="../images/al-biruni2.jpg" target="_blank">al-biruni2</a> Issued by Iran in 1980, with al-Farabi (left) and Avicenna (right) <a href="../images/al-biruni10.jpg" target="_blank">al-biruni10</a> Issued by Guinea-Bissau in 2008 <a href="../images/al-biruni11.jpg" target="_blank">al-biruni11</a> <a href="../images/al-biruni12.jpg" target="_blank">al-biruni12</a> Issued by Iran in 2011 <a href="../images/al-biruni13.jpg" target="_blank">al-biruni13</a> Issued by Afghanistan in 2018 <a href="../images/al-biruni19.jpg" target="_blank">al-biruni19</a> Issued by Uzbekistan in 2020 <a href="../images/al-biruni14.jpg" target="_blank">al-biruni14</a> Issued by Uzbekistan in 2023 <a href="../images/al_biruni15.jpg" target="_blank">al_biruni15</a> <a href="../images/al_biruni16.jpg" target="_blank">al_biruni16</a> <a href="../images/al_biruni17.jpg" target="_blank">al_biruni17</a> <a href="../images/al_biruni18.jpg" target="_blank">al_biruni18</a> <a id="Al-Farabi"></a>AL-FARABI <a href="../Store/al_farabi.html" target="_blank">Ⓣ</a> Issued by Turkey in 1950 <a href="../images/al-farabi1.jpg" target="_blank">al-farabi1</a> <a href="../images/al-farabi2.jpg" target="_blank">al-farabi2</a> <a href="../images/al-farabi3.jpg" target="_blank">al-farabi3</a> <a href="../images/al-farabi4.jpg" target="_blank">al-farabi4</a> Issued by Iran in 1951, celebrating the 1000th anniversary of his death <a href="../images/al-farabi5.jpg" target="_blank">al-farabi5</a> <a href="../images/al-farabi6.jpg" target="_blank">al-farabi6</a> Issued by Qatar in 1971 <a href="../images/al-farabi11.jpg" target="_blank">al-farabi11</a> Issued by Syria in 1974 <a href="../images/al-farabi10.jpg" target="_blank">al-farabi10</a> Issued by Egypt in 1975 <a href="../images/al-farabi8.jpg" target="_blank">al-farabi8</a> Issued by Soviet Union in 1975 <a href="../images/al-farabi9.jpg" target="_blank">al-farabi9</a> Issued by Iran in 1980, with al-Biruni (centre), and Avicenna (right) <a href="../images/avicenna18.jpg" target="_blank">avicenna18</a> Issued by Kazakhstan in 1993 (a banknote) <a href="../images/al-farabi12.jpg" target="_blank">al-farabi12</a> Issued by Tadjikistan in 2017 <a href="../images/al_farabi14.jpg" target="_blank">al_farabi14</a> Issued by Kazakhstan in 2020 <a href="../images/al-farabi7.jpg" target="_blank">al-farabi7</a> <a id="Al-Haytham"></a>AL-HAYTHAM, Ibn <a class="mlink" data-popup="../../Biographies/Al-Haytham/popup/" href="../../Biographies/Al-Haytham/">Ⓑ</a> <a href="../Store/al_haytham.html" target="_blank">Ⓣ</a> Issued by Pakistan in 1969 <a href="../images/al-haytham2.jpg" target="_blank">al-haytham2</a> Issued by Jordan in 1971 <a href="../images/al-haytham3.jpg" target="_blank">al-haytham3</a> Issued by Qatar in 1971 <a href="../images/al-haytham.jpg" target="_blank">al-haytham</a> Issued by Iraq in 1982 (a banknote) <a href="../images/al_haytham7.jpg" target="_blank">al_haytham7</a> Issued by Iraq in 2005 (a banknote) <a href="../images/al_haytham6.jpg" target="_blank">al_haytham6</a> Issued by Maldives in 2015 <a href="../images/al_haytham5.jpg" target="_blank">al_haytham5</a> <a id="Al-Kashi"></a>AL-KASHI, Jamshid <a class="mlink" data-popup="../../Biographies/Al-Kashi/popup/" href="../../Biographies/Al-Kashi/">Ⓑ</a> <a href="../Store/al_kashi.html" target="_blank">Ⓣ</a> Issued by Iran in 1979 <a href="../images/al-kashi.jpg" target="_blank">al-kashi</a> <a id="Al-Khwarizmi"></a>AL-KHWARIZMI <a class="mlink" data-popup="../../Biographies/Al-Khwarizmi/popup/" href="../../Biographies/Al-Khwarizmi/">Ⓑ</a> <a href="../Store/al_khwarizmi.html" target="_blank">Ⓣ</a> Issued by Soviet Union in 1983, to mark the 1200th birth anniversary <a href="../images/khowar.jpg" target="_blank">khowar</a> Issued by Sao Tome and Principe in 2008 <a href="../images/khowarizmi4.jpg" target="_blank">khowarizmi4</a> Issued by Guinea-Bissau in 2009 <a href="../images/khowarizmi5.jpg" target="_blank">khowarizmi5</a> Issued by Uzbekistan in 2012 <a href="../images/khowarizmi6.jpg" target="_blank">khowarizmi6</a> <a href="../images/khowarizmi7.jpg" target="_blank">khowarizmi7</a> <a href="../images/khowarizmi8.jpg" target="_blank">khowarizmi8</a> Issued by Uzbekistan in 2013 <a href="../images/khowarizmi9.jpg" target="_blank">khowarizmi9</a> Issued by Soviet Union (an air-letter) <a href="../images/khowarizmi3.jpg" target="_blank">khowarizmi3</a> <a id="Al-Kindi"></a>AL-KINDI <a class="mlink" data-popup="../../Biographies/Al-Kindi/popup/" href="../../Biographies/Al-Kindi/">Ⓑ</a> <a href="../Store/al_kindi.html" target="_blank">Ⓣ</a> Issued by Iraq in 1962 <a href="../images/al-kindi1.jpg" target="_blank">al-kindi1</a> Issued by Yemen in 1962 <a href="../images/al-kindi5.jpg" target="_blank">al-kindi5</a> Issued by Mali in 1970 <a href="../images/al-kindi4.jpg" target="_blank">al-kindi4</a> Issued by Egypt in 1975 <a href="../images/al-kindi3.jpg" target="_blank">al-kindi3</a> Issued by Syria in 1987 <a href="../images/al-kindi6.jpg" target="_blank">al-kindi6</a> Issued by Syria in 1994 <a href="../images/al-kindi2.jpg" target="_blank">al-kindi2</a> <a id="Al-Tusi_Nasir"></a>AL-TUSI, Nasir al-Din Proper name: Muhammad ibn Muhammad ibn al-Hasan al-Tusi <a class="mlink" data-popup="../../Biographies/Al-Tusi_Nasir/popup/" href="../../Biographies/Al-Tusi_Nasir/">Ⓑ</a> <a href="../Store/al_tusi_nasir.html" target="_blank">Ⓣ</a> Issued by Iran in 1956 <a href="../images/al-tusi.jpg" target="_blank">al-tusi</a> Issued by Iran in 1974 <a href="../images/al-tusi6.jpg" target="_blank">al-tusi6</a> <a href="../images/al-tusi7.jpg" target="_blank">al-tusi7</a> Issued by Dominica in 1985 <a href="../images/al-tusi3.jpg" target="_blank">al-tusi3</a> Issued by Iran in 1993 <a href="../images/al-tusi5.jpg" target="_blank">al-tusi5</a> Issued by Syria in 2000 <a href="../images/al-tusi4.jpg" target="_blank">al-tusi4</a> Issued by Azerbaijan in 2001 <a href="../images/al-tusi2.jpg" target="_blank">al-tusi2</a> Issued by Azerbaijan in 2009 <a href="../images/al-tusi8.jpg" target="_blank">al-tusi8</a> <a id="Al-Zarqali">AL-ZARQALI or Ibn Zarqala </a><a class="mlink" data-popup="../../Biographies/Al-Zarqali/popup/" href="../../Biographies/Al-Zarqali/">Ⓑ</a> <a href="../Store/al_zarqali.html" target="_blank">Ⓣ</a> Issued by Spain in 1986 <a href="../images/al-zarqali.jpg" target="_blank">al-zarqali</a> <a id="Alberti"></a>ALBERTI, Leon <a class="mlink" data-popup="../../Biographies/Alberti/popup/" href="../../Biographies/Alberti/">Ⓑ</a> <a href="../Store/alberti.html" target="_blank">Ⓣ</a> Issued by Italy in 1972 <a href="../images/alberti1.jpg" target="_blank">alberti1</a> <a id="Albertus"></a>ALBERTUS MAGNUS <a class="mlink" data-popup="../../Biographies/Albertus/popup/" href="../../Biographies/Albertus/">Ⓑ</a> <a href="../Store/albertus.html" target="_blank">Ⓣ</a> Issued by Germany in 1961 <a href="../images/albertus2.jpg" target="_blank">albertus2</a> Issued by Belgium in 1969, depicting a wood sculpture by Artus Quellinus <a href="../images/albertus3.jpg" target="_blank">albertus3</a> Issued by Germany in 1980 <a href="../images/albertus.jpg" target="_blank">albertus</a> Issued by Vatican City in 1980 <a href="../images/albertus4.jpg" target="_blank">albertus4</a> <a href="../images/albertus5.jpg" target="_blank">albertus5</a> <a id="Allotey"></a>ALLOTEY, Francis <a class="mlink" data-popup="../../Biographies/Allotey/popup/" href="../../Biographies/Allotey/">Ⓑ</a> <a href="../Store/allotey.html" target="_blank">Ⓣ</a> Issued by Ghana in 2005 <a href="../images/allotey.jpg" target="_blank">allotey</a> <a id="Ambartsumian"></a>AMBARTSUMIAN, Victor <a class="mlink" data-popup="../../Biographies/Ambartsumian/popup/" href="../../Biographies/Ambartsumian/">Ⓑ</a> <a href="../Store/ambartsumian.html" target="_blank">Ⓣ</a> Issued by Armenia in 1998 (a banknote) <a href="../images/ambartsumian1.jpg" target="_blank">ambartsumian1</a> Issued by Armenia in 2000 <a href="../images/ambartsumian2.jpg" target="_blank">ambartsumian2</a> Issued by Armenia in 2008 <a href="../images/ambartsumian3.jpg" target="_blank">ambartsumian3</a> <a id="Ampere"></a>AMPÈRE, André-Marie <a class="mlink" data-popup="../../Biographies/Ampere/popup/" href="../../Biographies/Ampere/">Ⓑ</a> <a href="../Store/ampere.html" target="_blank">Ⓣ</a> Issued by France in 1927 (a banknote -- with Pasteur on the right) <a href="../images/ampere15.jpg" target="_blank">ampere15</a> Issued by France in 1936 <a href="../images/ampere1.jpg" target="_blank">ampere1</a> Issued by France in 1949 <a href="../images/ampere2.jpg" target="_blank">ampere2</a> Issued by Djibouti in 1975 (as French Territory of the Afars and the Issas) <a href="../images/ampere14.jpg" target="_blank">ampere14</a> Issued by German Democratic Republic in 1975 <a href="../images/ampere4.jpg" target="_blank">ampere4</a> Issued by Monaco in 1975 <a href="../images/ampere7.jpg" target="_blank">ampere7</a> Issued by Republic of the Congo in 1975 <a href="../images/ampere13.jpg" target="_blank">ampere13</a> Issued by Albania in 1986 <a href="../images/ampere5.jpg" target="_blank">ampere5</a> <a href="../images/ampere6.jpg" target="_blank">ampere6</a> Issued by Marshall Islands in 2012 <a href="../images/ampere3.jpg" target="_blank">ampere3</a> Issued by Macedonia in 2020 <a href="../images/ampere12.jpg" target="_blank">ampere12</a> <a id="Anania"></a>ANANIAS SIRAKUNI <a class="mlink" data-popup="../../Biographies/Anania/popup/" href="../../Biographies/Anania/">Ⓑ</a> <a href="../Store/anania.html" target="_blank">Ⓣ</a> Issued by Armenia in 2005 <a href="../images/anania1.jpg" target="_blank">anania1</a> <a id="Anaxagoras"></a>ANAXAGORAS <a class="mlink" data-popup="../../Biographies/Anaxagoras/popup/" href="../../Biographies/Anaxagoras/">Ⓑ</a> <a href="../Store/Anaxagoras.html" target="_blank">Ⓣ</a> Issued by Greece in 2024 <a href="../images/anaxagoras1.jpg" target="_blank">anaxagoras1</a> <a id="Andrunachievici"></a>ANDRUNACHIEVICI, Vlademir <a href="../Store/andrunachievici.html" target="_blank">Ⓣ</a> Issued by Moldova in 2017 <a href="../images/andrunachievici1.jpg" target="_blank">andrunachievici1</a> <a id="Arago"></a>ARAGO, François <a class="mlink" data-popup="../../Biographies/Arago/popup/" href="../../Biographies/Arago/">Ⓑ</a> <a href="../Store/arago.html" target="_blank">Ⓣ</a> Issued by France in 1939 <a href="../images/arago2.jpg" target="_blank">arago2</a> Issued by France in 1949 <a href="../images/arago3.jpg" target="_blank">arago3</a> Issued by France in 1986 <a href="../images/arago.jpg" target="_blank">arago</a> <a id="Archimedes"></a>ARCHIMEDES <a class="mlink" data-popup="../../Biographies/Archimedes/popup/" href="../../Biographies/Archimedes/">Ⓑ</a> <a href="../Store/archimedes.html" target="_blank">Ⓣ</a> Issued by Spain in 1963 <a href="../images/arch5.jpg" target="_blank">arch5</a> Issued by Nicaragua in 1971 , law of levers <a href="../images/arch12.jpg" target="_blank">arch12</a> Issued by German Democratic Republic in 1973, one of a series of 'Old Masters Paintings'. The painting 'Archimedes' is by Domenico Fetti <a href="../images/arch1.jpg" target="_blank">arch1</a> Issued by San Marino in 1982 <a href="../images/arch3.jpg" target="_blank">arch3</a> Issued by Greece in 1983 <a href="../images/arch4.jpg" target="_blank">arch4</a> Issued by Italy in 1983 <a href="../images/arch2.jpg" target="_blank">arch2</a> Issued by Turks and Caicos Islands in 1992 <a href="../images/arch14.jpg" target="_blank">arch14</a> Issued by Guinea-Bissau in 2008 1921 <a href="../images/arch7.jpg" target="_blank">arch7</a> Issued by Gabon in 2010 <a href="../images/arch9.jpg" target="_blank">arch9</a> Issued by Italy in 2013, calculation of π -- note the digits of π in the background. <a href="../images/arch13.jpg" target="_blank">arch13</a> Issued by Chad in 2015 <a href="../images/arch11.jpg" target="_blank">arch11</a> Issued by Romania (an air-letter) <a href="../images/arch8.jpg" target="_blank">arch8</a> <a id="Arf"></a>ARF, Cahit <a class="mlink" data-popup="../../Biographies/Arf/popup/" href="../../Biographies/Arf/">Ⓑ</a> <a href="../Store/arf.html" target="_blank">Ⓣ</a> Issued by Turkey in 2009 (a banknote) <a href="../images/arf1.jpg" target="_blank">arf1</a> <a id="Aristarchus"></a>ARISTARCHUS OF SAMOS <a class="mlink" data-popup="../../Biographies/Aristarchus/popup/" href="../../Biographies/Aristarchus/">Ⓑ</a> <a href="../Store/aristarchus.html" target="_blank">Ⓣ</a> Issued by Greece in 1980 <a href="../images/aristarchus1.jpg" target="_blank">aristarchus1</a> <a href="../images/aristarchus2.jpg" target="_blank">aristarchus2</a> <a id="Aristotle"></a>ARISTOTLE <a class="mlink" data-popup="../../Biographies/Aristotle/popup/" href="../../Biographies/Aristotle/">Ⓑ</a> <a href="../Store/aristotle.html" target="_blank">Ⓣ</a> Issued by Greece in 1941 (a banknote) <a href="../images/aristotle22.jpg" target="_blank">aristotle22</a> Issued by Greece in 1947 (banknotes) <a href="../images/aristotle26.jpg" target="_blank">aristotle26</a> <a href="../images/aristotle20.jpg" target="_blank">aristotle20</a> Issued by Greece in 1956 <a href="../images/aristotle14.jpg" target="_blank">aristotle14</a> Issued by Cyprus in 1978 <a href="../images/aristotle5.jpg" target="_blank">aristotle5</a> Issued by Greece in 1978 <a href="../images/aristotle1.jpg" target="_blank">aristotle1</a> <a href="../images/aristotle2.jpg" target="_blank">aristotle2</a> <a href="../images/aristotle3.jpg" target="_blank">aristotle3</a> <a href="../images/aristotle4.jpg" target="_blank">aristotle4</a> Issued by Mali in 1978 <a href="../images/aristotle25.jpg" target="_blank">aristotle25</a> Issued by Mexico in 1978 <a href="../images/aristotle6.jpg" target="_blank">aristotle6</a> <a href="../images/aristotle7.jpg" target="_blank">aristotle7</a> Issued by Greece in 1992 <a href="../images/aristotle24.jpg" target="_blank">aristotle24</a> Issued by Spain in 1992 <a href="../images/aristotle8.jpg" target="_blank">aristotle8</a> Issued by Chad in 2009 <a href="../images/aristotle18.jpg" target="_blank">aristotle18</a> <a href="../images/aristotle19.jpg" target="_blank">aristotle19</a> Issued by Gibraltar in 2009 <a href="../images/aristotle17.jpg" target="_blank">aristotle17</a> Issued by Bosnia and Herzegovina in 2016 <a href="../images/aristotle10.jpg" target="_blank">aristotle10</a> Issued by Greece in 2016 <a href="../images/aristotle11.jpg" target="_blank">aristotle11</a> <a href="../images/aristotle12.jpg" target="_blank">aristotle12</a> <a href="../images/aristotle13.jpg" target="_blank">aristotle13</a> (with Plato) <a id="Aryabhata"></a>ARYABHATA <a class="mlink" data-popup="../../Biographies/Aryabhata/@popup/" href="../../Biographies/Aryabhata">Ⓑ</a> <a href="../Store/aryabhata.html" target="_blank">Ⓣ</a> Issued by India in 1983 (a banknote -- of a satellite) <a href="../images/aryabhata1.jpg" target="_blank">aryabhata1</a> <a id="Avicenna"></a>AVICENNA (Abu Ali al-Husain ibn Abdallah ibn Sina) <a class="mlink" data-popup="../../Biographies/Avicenna/popup/" href="../../Biographies/Avicenna/">Ⓑ</a> <a href="../Store/avicenna.html" target="_blank">Ⓣ</a> Issued by Lebanon in 1948 <a href="../images/avicenna39.jpg" target="_blank">avicenna39</a> <a href="../images/avicenna39a.jpg" target="_blank">avicenna39a</a> Issued by Afghanistan in 1951 <a href="../images/avicenna36.jpg" target="_blank">avicenna36</a> <a href="../images/avicenna37.jpg" target="_blank">avicenna37</a> Issued by German Democratic Republic in 1952 <a href="../images/avicenna13.jpg" target="_blank">avicenna13</a> Issued by Poland in 1952 <a href="../images/avicenna9.jpg" target="_blank">avicenna9</a> Issued by Iran in 1954 <a href="../images/avicenna41a.jpg" target="_blank">avicenna41a</a> <a href="../images/avicenna41b.jpg" target="_blank">avicenna41b</a> <a href="../images/avicenna41c.jpg" target="_blank">avicenna41c</a> <a href="../images/avicenna41d.jpg" target="_blank">avicenna41d</a> Issued by Iran in 1962 <a href="../images/avicenna24.jpg" target="_blank">avicenna24</a> Issued by Algeria in 1963 <a href="../images/avicenna40.jpg" target="_blank">avicenna40</a> Issued by Syria in 1965 <a href="../images/avicenna25.jpg" target="_blank">avicenna25</a> Issued by Pakistan in 1966 <a href="../images/avicenna16.jpg" target="_blank">avicenna16</a> Issued by Yemen in 1966 <a href="../images/avicenna34.jpg" target="_blank">avicenna34</a> <a href="../images/avicenna35.jpg" target="_blank">avicenna35</a> Issued by Egypt in 1968 (and paired with a stamp depicting Imhotep) <a href="../images/avicenna8.jpg" target="_blank">avicenna8</a> Issued by Kuwait in 1969 <a href="../images/avicenna29.jpg" target="_blank">avicenna29</a> <a href="../images/avicenna30.jpg" target="_blank">avicenna30</a> Issued by Dubai in 1971 <a href="../images/avicenna1.jpg" target="_blank">avicenna1</a> Issued by Jordan in 1971 <a href="../images/avicenna15.jpg" target="_blank">avicenna15</a> Issued by Qatar in 1971 <a href="../images/avicenna33.jpg" target="_blank">avicenna33</a> Issued by Iran in 1974 <a href="../images/avicenna32.jpg" target="_blank">avicenna32</a> Issued by Comoros in 1979 <a href="../images/avicenna2.jpg" target="_blank">avicenna2</a> Issued by Algeria in 1980 <a href="../images/avicenna6.jpg" target="_blank">avicenna6</a> Issued by Comoros in 1980 <a href="../images/avicenna44.jpg" target="_blank">avicenna44</a> Issued by Iran in 1980, depicting al-Farabi, al-Biruni, and Avicenna <a href="../images/avicenna18.jpg" target="_blank">avicenna18</a> Issued by Kuwait in 1980 <a href="../images/avicenna11.jpg" target="_blank">avicenna11</a> <a href="../images/avicenna12.jpg" target="_blank">avicenna12</a> Issued by Libya in 1980 <a href="../images/avicenna10.jpg" target="_blank">avicenna10</a> Issued by Mali in 1980, on the 1000th anniversary of his birth <a href="../images/avicenna3.jpg" target="_blank">avicenna3</a> <a href="../images/avicenna4.jpg" target="_blank">avicenna4</a> Issued by Soviet Union in 1980 <a href="../images/avicenna7.jpg" target="_blank">avicenna7</a> Issued by Tunisia in 1980 <a href="../images/avicenna5.jpg" target="_blank">avicenna5</a> Issued by Turkey in 1980 <a href="../images/avicenna21.jpg" target="_blank">avicenna21</a> <a href="../images/avicenna22.jpg" target="_blank">avicenna22</a> Issued by Syria in 1981 <a href="../images/avicenna26.jpg" target="_blank">avicenna26</a> Issued by Austria in 1982 <a href="../images/avicenna42.jpg" target="_blank">avicenna42</a> Issued by Iran in 1983 <a href="../images/avicenna27.jpg" target="_blank">avicenna27</a> Issued by Hungary in 1987 <a href="../images/avicenna23.jpg" target="_blank">avicenna23</a> <a href="../images/avicenna45.jpg" target="_blank">avicenna45</a> Issued by Iran in 1989 (also showing Pasteur) <a href="../images/avicenna38.jpg" target="_blank">avicenna38</a> Issued by Iran in 1992 <a href="../images/avicenna28.jpg" target="_blank">avicenna28</a> Issued by Tadjikistan in 1999 (a banknote) <a href="../images/avicenna46.jpg" target="_blank">avicenna46</a> Issued by Somalia in 2003 <a href="../images/avicenna31.jpg" target="_blank">avicenna31</a> Issued by Iran in 2004 <a href="../images/avicenna17.jpg" target="_blank">avicenna17</a> Issued by France in 2005 <a href="../images/avicenna20.jpg" target="_blank">avicenna20</a> Issued by Tadjikistan in 2005 <a href="../images/avicenna19a.jpg" target="_blank">avicenna19a</a> <a href="../images/avicenna19b.jpg" target="_blank">avicenna19b</a> Issued by Portugal in 2013, to honour 1000 years of the Avicenna Canon <a href="../images/avicenna43.jpg" target="_blank">avicenna43</a> <a id="Babbage"></a>BABBAGE, Charles <a class="mlink" data-popup="../../Biographies/Babbage/popup/" href="../../Biographies/Babbage/">Ⓑ</a> <a href="../Store/babbage.html" target="_blank">Ⓣ</a> Issued by Great Britain in 1991 <a href="../images/babbage.jpg" target="_blank">babbage</a> Issued by Guinea-Bissau in 2007 <a href="../images/babbage2.jpg" target="_blank">babbage2</a> Issued by Great Britain in 2010 <a href="../images/babbage4.jpg" target="_blank">babbage4</a> <a id="Baker_Alan"></a>BAKER, Alan <a class="mlink" data-popup="../../Biographies/Baker_Alan/popup/" href="../../Biographies/Baker_Alan/">Ⓑ</a> <a href="../Store/baker_alan.html" target="_blank">Ⓣ</a> Issued by Guinea in 2008 <a href="../images/baker.jpg" target="_blank">baker</a> <a id="Balseiro"></a>BALSEIRO, José <a href="../Store/balseiro.html" target="_blank">Ⓣ</a> Issued by Argentina in 2005 <a href="../images/balseiro.jpg" target="_blank">balseiro</a> <a id="Banach"></a>BANACH, Stefan <a class="mlink" data-popup="../../Biographies/Banach/popup/" href="../../Biographies/Banach/">Ⓑ</a> <a href="../Store/banach.html" target="_blank">Ⓣ</a> Issued by Poland in 1982, part of a series to celebrate the International Congress in Warsaw <a href="../images/banach.jpg" target="_blank">banach</a> <a id="Banachiewicz"></a>BANACHIEWICZ, Tadeusz <a class="mlink" data-popup="../../Biographies/Banachiewicz/popup/" href="../../Biographies/Banachiewicz/">Ⓑ</a> <a href="../Store/banachiewicz.html" target="_blank">Ⓣ</a> Issued by Poland in 1983 <a href="../images/banachiewicz.jpg" target="_blank">banachiewicz</a> <a id="Banneker"></a>BANNEKER, Benjamin <a class="mlink" data-popup="../../Biographies/Banneker/popup/" href="../../Biographies/Banneker/">Ⓑ</a> <a href="../Store/banneker.html" target="_blank">Ⓣ</a> Issued by USA in 1980 <a href="../images/banneker.jpg" target="_blank">banneker</a> Issued by Turks and Caicos Islands in 1982 <a href="../images/banneker2.jpg" target="_blank">banneker2</a> <a id="Banu_Musa"></a>BANU MUSA BROTHERS <a class="mlink" data-popup="../../Biographies/Banu_Musa/popup/" href="../../Biographies/Banu_Musa/">Ⓑ</a> <a href="../Store/banu_musa.html" target="_blank">Ⓣ</a> Issued by Syria in 1996 <a href="../images/banu_musa.jpg" target="_blank">banu_musa</a> <a id="Barkla"></a>BARKLA, Charles <a class="mlink" data-popup="../../Biographies/Barkla/popup/" href="../../Biographies/Barkla/">Ⓑ</a> <a href="../Store/barkla.html" target="_blank">Ⓣ</a> Issued by Sweden in 1977 <a href="../images/barkla2.jpg" target="_blank">barkla2</a> Issued by Togo in 1995 <a href="../images/barkla4.jpg" target="_blank">barkla4</a> Issued by Guinea-Bissau in 2009 <a href="../images/barkla1.jpg" target="_blank">barkla1</a> <a id="Berkeley"></a>BERKELEY, George <a class="mlink" data-popup="../../Biographies/Berkeley/popup/" href="../../Biographies/Berkeley/">Ⓑ</a> <a href="../Store/berkeley.html" target="_blank">Ⓣ</a> Issued by Ireland in 1985 <a href="../images/berkeley1.jpg" target="_blank">berkeley1</a> <a id="Bernoulli_Jacob"></a>BERNOULLI, Jacob <a class="mlink" data-popup="../../Biographies/Bernoulli_Jacob/popup/" href="../../Biographies/Bernoulli_Jacob/">Ⓑ</a> <a href="../Store/bernoulli_jacob.html" target="_blank">Ⓣ</a> Issued by Switzerland in 1994 (to celebrate the International Congress in Zürich) <a href="../images/bernoulli.jpg" target="_blank">bernoulli</a> Issued by Soviet Union (an air-letter) <a href="../images/bernoulli2.jpg" target="_blank">bernoulli2</a> <a id="Bessel"></a>BESSEL, Friedrich Wilhelm <a class="mlink" data-popup="../../Biographies/Bessel/popup/" href="../../Biographies/Bessel/">Ⓑ</a> <a href="../Store/bessel.html" target="_blank">Ⓣ</a> Issued by Germany in 1921 (an emergency banknote) <a href="../images/bessel4.jpg" target="_blank">bessel4</a> Issued by Germany in 1984, on his 200th birthday <a href="../images/bessel.jpg" target="_blank">bessel</a> Issued by Nicaragua in 1994, as part of a series depicting astronomers <a href="../images/bessel2.jpg" target="_blank">bessel2</a> Issued by Soviet Union (an air-letter) <a href="../images/bessel3.jpg" target="_blank">bessel3</a> <a id="Bethe"></a>BETHE, Hans <a class="mlink" data-popup="../../Biographies/Bethe/popup/" href="../../Biographies/Bethe/">Ⓑ</a> <a href="../Store/bethe.html" target="_blank">Ⓣ</a> Issued by Gabon in 1995 <a href="../images/bethe2.jpg" target="_blank">bethe2</a> Issued by Grenada in 1995 <a href="../images/bethe3.jpg" target="_blank">bethe3</a> Issued by Guinea in 2006 <a href="../images/bethe1.jpg" target="_blank">bethe1</a> <a id="Bjerknes_Vilhelm"></a>BJERKNES, Vilhelm <a class="mlink" data-popup="../../Biographies/Bjerknes_Vilhelm/popup/" href="../../Biographies/Bjerknes_Vilhelm/">Ⓑ</a> <a href="../Store/bjerknes_vilhelm.html" target="_blank">Ⓣ</a> Issued by Norway in 1962, on his 100th birthday <a href="../images/bjerk1.jpg" target="_blank">bjerk1</a> <a href="../images/bjerk2.jpg" target="_blank">bjerk2</a> <a id="Blaeu"></a>BLAEU, Willem <a href="../Store/blaeu.html" target="_blank">Ⓣ</a> Issued by Netherlands in 1983 <a href="../images/blaeu.jpg" target="_blank">blaeu</a> Issued by Netherlands in 2020 <a href="../images/blaue2.jpg" target="_blank">blaue2</a> <a id="Bohr_Niels"></a>BOHR, Niels <a class="mlink" data-popup="../../Biographies/Bohr_Niels/popup/" href="../../Biographies/Bohr_Niels/">Ⓑ</a> <a href="../Store/bohr_niels.html" target="_blank">Ⓣ</a> Issued by Denmark in 1963 <a href="../images/bohr_niels1.jpg" target="_blank">bohr_niels1</a> <a href="../images/bohr_niels7.jpg" target="_blank">bohr_niels7</a> Issued by Greenland in 1963 <a href="../images/bohr_niels6.jpg" target="_blank">bohr_niels6</a> <a href="../images/bohr_niels8.jpg" target="_blank">bohr_niels8</a> Issued by Denmark in 1985 <a href="../images/bohr_niels4.jpg" target="_blank">bohr_niels4</a> Issued by Denmark in 1997 (a banknote) <a href="../images/bohr_niels5.jpg" target="_blank">bohr_niels5</a> Issued by Portugal in 2000 (with Planck and Einstein) <a href="../images/planck_einstein_bohr.jpg" target="_blank">planck_einstein_bohr</a> Issued by Guinea-Bissau in 2005 <a href="../images/bohr_niels2.jpg" target="_blank">bohr_niels2</a> Issued by Guinea-Bissau in 2008 <a href="../images/bohr_niels3.jpg" target="_blank">bohr_niels3</a> Issued by Guinea in 2012 (with Heisenberg) <a href="../images/heisenberg9.jpg" target="_blank">heisenberg9</a> Issued by Mozambique in 2013 <a href="../images/bohr_niels13.jpg" target="_blank">bohr_niels13</a> Issued by Mongolia in 2014 <a href="../images/bohr_niels11.jpg" target="_blank">bohr_niels11</a> Issued by Togo in 2020 <a href="../images/bohr_niels12.jpg" target="_blank">bohr_niels12</a> <a id="Boltzmann"></a>BOLTZMANN, Ludwig <a class="mlink" data-popup="../../Biographies/Boltzmann/popup/" href="../../Biographies/Boltzmann/">Ⓑ</a> <a href="../Store/boltzmann.html" target="_blank">Ⓣ</a> Issued by Nicaragua in 1971 <a href="../images/formula2.jpg" target="_blank">formula2</a> Issued by Austria in 1981 <a href="../images/boltzmann1.jpg" target="_blank">boltzmann1</a> <a id="Bolyai_Farkas"></a>BOLYAI, Farkas <a class="mlink" data-popup="../../Biographies/Bolyai_Farkas/popup/" href="../../Biographies/Bolyai_Farkas/">Ⓑ</a> <a href="../Store/bolyai_farkas.html" target="_blank">Ⓣ</a> Issued by Hungary in 1932, part of a series 'Portraits of Famous Hungarians' <a href="../images/bolyai2.jpg" target="_blank">bolyai2</a> Issued by Hungary in 1975, on his 200th birthday <a href="../images/bolyai.jpg" target="_blank">bolyai</a> <a id="Bolyai"></a>BOLYAI, Janos <a class="mlink" data-popup="../../Biographies/Bolyai/popup/" href="../../Biographies/Bolyai/">Ⓑ</a> <a href="../Store/bolyai.html" target="_blank">Ⓣ</a> Issued by Hungary in 1960, on the 100th anniversary of his death <a href="../images/bolyai3.jpg" target="_blank">bolyai3</a> (See <a class="gllink" data-popup="../../Glossary/bolyai_note/" href="../../Glossary/#bolyai_note">THIS NOTE</a> ) Issued by Romania in 1960 <a href="../images/bolyai4.jpg" target="_blank">bolyai4</a> (See <a class="gllink" data-popup="../../Glossary/bolyai_note/" href="../../Glossary/#bolyai_note">THIS NOTE</a> ) Issued by Hungary in 2002 <a href="../images/bolyai5.jpg" target="_blank">bolyai5</a> <a id="Bolzano"></a>BOLZANO, Bernard <a class="mlink" data-popup="../../Biographies/Bolzano/popup/" href="../../Biographies/Bolzano/">Ⓑ</a> <a href="../Store/bolzano.html" target="_blank">Ⓣ</a> Issued by Czechoslovakia in 1981, part of an eight-stamp series 'Famous Persons' <a href="../images/bolzano.jpg" target="_blank">bolzano</a> <a id="Borda"></a>BORDA, Jean-Charles <a class="mlink" data-popup="../../Biographies/Borda/popup/" href="../../Biographies/Borda/">Ⓑ</a> <a href="../Store/borda.html" target="_blank">Ⓣ</a> Issued by Germany in 1981 <a href="../images/borda1.jpg" target="_blank">borda1</a> <a id="Born"></a>BORN, Max <a class="mlink" data-popup="../../Biographies/Born/popup/" href="../../Biographies/Born/">Ⓑ</a> <a href="../Store/born.html" target="_blank">Ⓣ</a> Issued by Germany in 1982 <a href="../images/born3.jpg" target="_blank">born3</a> Issued by Ghana in 1995 <a href="../images/born2.jpg" target="_blank">born2</a> Issued by Guinea in 2006 <a href="../images/born1.jpg" target="_blank">born1</a> <a id="Boscovich"></a>BOSCOVICH, Ruggero <a class="mlink" data-popup="../../Biographies/Boscovich/popup/" href="../../Biographies/Boscovich/">Ⓑ</a> <a href="../Store/boscovich.html" target="_blank">Ⓣ</a> Issued by Croatia in 1943 <a href="../images/boscovich1.jpg" target="_blank">boscovich1</a> <a href="../images/boscovich2.jpg" target="_blank">boscovich2</a> Issued by Yugoslavia in 1960 <a href="../images/boscovich7.jpg" target="_blank">boscovich7</a> Issued by Yugoslavia in 1987 <a href="../images/boscovich8.jpg" target="_blank">boscovich8</a> Issued by Croatia in 1991 (banknotes) <a href="../images/boscovich3.jpg" target="_blank">boscovich3</a> <a href="../images/boscovich6.jpg" target="_blank">boscovich6</a> <a href="../images/boscovich4.jpg" target="_blank">boscovich4</a> <a href="../images/boscovich5.jpg" target="_blank">boscovich5</a> <a href="../images/boscovich14.jpg" target="_blank">boscovich14</a> Issued by Croatia in 1993 (banknotes) <a href="../images/boscovich15.jpg" target="_blank">boscovich15</a> <a href="../images/boscovich16.jpg" target="_blank">boscovich16</a> Issued by Bosnia and Herzegovina in 2011 <a href="../images/boscovich17.jpg" target="_blank">boscovich17</a> Issued by Croatia in 2011 <a href="../images/boscovich13.jpg" target="_blank">boscovich13</a> Issued by Vatican City in 2011 <a href="../images/boscovich12.jpg" target="_blank">boscovich12</a> <a id="Bose"></a>BOSE, Satyendranath <a class="mlink" data-popup="../../Biographies/Bose/popup/" href="../../Biographies/Bose/">Ⓑ</a> <a href="../Store/bose.html" target="_blank">Ⓣ</a> Issued by India in 1994 <a href="../images/bose1.jpg" target="_blank">bose1</a> <a id="Bougainville"></a>BOUGAINVILLE, Louis Antoine de <a class="mlink" data-popup="../../Biographies/Bougainville/popup/" href="../../Biographies/Bougainville/">Ⓑ</a> <a href="../Store/bougainville.html" target="_blank">Ⓣ</a> Issued by New Caledonia in 1928 <a href="../images/bougainville3.jpg" target="_blank">bougainville3</a> <a href="../images/bougainville12.jpg" target="_blank">bougainville12</a> <a href="../images/bougainville13.jpg" target="_blank">bougainville13</a> <a href="../images/bougainville17.jpg" target="_blank">bougainville17</a> <a href="../images/bougainville18.jpg" target="_blank">bougainville18</a> <a href="../images/bougainville19.jpg" target="_blank">bougainville19</a> <a href="../images/bougainville20.jpg" target="_blank">bougainville20</a> <a href="../images/bougainville21.jpg" target="_blank">bougainville21</a> Issued by Martinique in 1947 (a banknote) <a href="../images/bougainville31.jpg" target="_blank">bougainville31</a> Issued by St Pierre and Miquelon in 1950 (a banknote) <a href="../images/bougainville2.jpg" target="_blank">bougainville2</a> Issued by French Polynesia in 1968 <a href="../images/bougainville9.jpg" target="_blank">bougainville9</a> Issued by Samoa in 1968 <a href="../images/bougainville6.jpg" target="_blank">bougainville6</a> <a href="../images/bougainville14.jpg" target="_blank">bougainville14</a> <a href="../images/bougainville26.jpg" target="_blank">bougainville26</a> <a href="../images/bougainville27.jpg" target="_blank">bougainville27</a> Issued by Solomon Islands in 1968 (as British Solomon Islands) <a href="../images/bougainville24.jpg" target="_blank">bougainville24</a> Issued by Vanuatu in 1968 (as New Hebrides) <a href="../images/bougainville25.jpg" target="_blank">bougainville25</a> Issued by Wallis and Futuna in 1973 <a href="../images/bougainville7.jpg" target="_blank">bougainville7</a> Issued by Tahiti in 1982 (a banknote) <a href="../images/bougainville33.jpg" target="_blank">bougainville33</a> Issued by Wallis and Futuna in 1982 <a href="../images/bougainville11.jpg" target="_blank">bougainville11</a> Issued by India in 1985 <a href="../images/bougainville28.jpg" target="_blank">bougainville28</a> <a href="../images/bougainville29.jpg" target="_blank">bougainville29</a> Issued by St Helena in 1986 <a href="../images/bougainville22.jpg" target="_blank">bougainville22</a> Issued by France in 1988 <a href="../images/bougainville.jpg" target="_blank">bougainville</a> Issued by Samoa in 1988 <a href="../images/bougainville10.jpg" target="_blank">bougainville10</a> Issued by Cambodia in 1992 <a href="../images/bougainville4.jpg" target="_blank">bougainville4</a> Issued by Papua New Guinea in 1999 <a href="../images/bougainville15.jpg" target="_blank">bougainville15</a> Issued by Vanuatu in 1999 <a href="../images/bougainville16.jpg" target="_blank">bougainville16</a> <a id="Bouguer"></a>BOUGUER, Pierre <a class="mlink" data-popup="../../Biographies/Bouguer/popup/" href="../../Biographies/Bouguer/">Ⓑ</a> <a href="../Store/bouguer.html" target="_blank">Ⓣ</a> Issued by Ecuador in 1936 (with La Condamine and Godin) <a href="../images/condamine4.jpg" target="_blank">condamine4</a> <a href="../images/condamine5.jpg" target="_blank">condamine5</a> <a id="Boyle"></a>BOYLE, Robert <a class="mlink" data-popup="../../Biographies/Boyle/popup/" href="../../Biographies/Boyle/">Ⓑ</a> <a href="../Store/boyle.html" target="_blank">Ⓣ</a> Issued by Ireland in 1981 <a href="../images/boyle1.jpg" target="_blank">boyle1</a> Issued by Granada in 1987 <a href="../images/boyle5.jpg" target="_blank">boyle5</a> Issued by Great Britain in 2010 <a href="../images/boyle2.jpg" target="_blank">boyle2</a> Issued by Ireland in 2012 <a href="../images/boyle3.jpg" target="_blank">boyle3</a> Issued by Marshall Islands in 2012 <a href="../images/boyle4.jpg" target="_blank">boyle4</a> <a id="Bradley"></a>BRADLEY, James <a class="mlink" data-popup="../../Biographies/Bradley/popup/" href="../../Biographies/Bradley/">Ⓑ</a> <a href="../Store/bradley.html" target="_blank">Ⓣ</a> Issued by Nicaragua in 1984 <a href="../images/bradley2.jpg" target="_blank">bradley2</a> Issued by Guinea in 2010 <a href="../images/bradley1.jpg" target="_blank">bradley1</a> <a id="Brahe"></a>BRAHE, Tycho <a class="mlink" data-popup="../../Biographies/Brahe/popup/" href="../../Biographies/Brahe/">Ⓑ</a> <a href="../Store/brahe.html" target="_blank">Ⓣ</a> Issued by Denmark in 1946 <a href="../images/brahe1.jpg" target="_blank">brahe1</a> Issued by Yemen in 1969 <a href="../images/brahe17.jpg" target="_blank">brahe17</a> Issued by Ajman in 1971 <a href="../images/brahe18.jpg" target="_blank">brahe18</a> Issued by Ascension in 1971 <a href="../images/brahe14.jpg" target="_blank">brahe14</a> Issued by Denmark in 1973 <a href="../images/brahe15.jpg" target="_blank">brahe15</a> Issued by Grenada in 1985 <a href="../images/brahe3.jpg" target="_blank">brahe3</a> Issued by Uganda in 1985 <a href="../images/brahe2.jpg" target="_blank">brahe2</a> Issued by Denmark in 1995 <a href="../images/brahe6.jpg" target="_blank">brahe6</a> <a href="../images/brahe7.jpg" target="_blank">brahe7</a> Issued by Sweden in 1995 <a href="../images/brahe4.jpg" target="_blank">brahe4</a> <a href="../images/brahe5.jpg" target="_blank">brahe5</a> Issued by Czech Republic in 1996 <a href="../images/brahe10.jpg" target="_blank">brahe10</a> Issued by Guinea in 2008 <a href="../images/brahe8.jpg" target="_blank">brahe8</a> <a href="../images/brahe9.jpg" target="_blank">brahe9</a> Issued by Denmark in 2012 <a href="../images/brahe13.jpg" target="_blank">brahe13</a> <a id="Broch"></a>BROCH, Ole <a class="mlink" data-popup="../../Biographies/Broch/popup/" href="../../Biographies/Broch/">Ⓑ</a> <a href="../Store/broch.html" target="_blank">Ⓣ</a> Issued by Norway in 1975 <a href="../images/broch1.jpg" target="_blank">broch1</a> <a id="Brunelleschi"></a>BRUNELLESCHI, Filippo <a class="mlink" data-popup="../../Biographies/Brunelleschi/popup/" href="../../Biographies/Brunelleschi/">Ⓑ</a> <a href="../Store/brunelleschi.html" target="_blank">Ⓣ</a> Issued by Italy in 1977 <a href="../images/brunelleschi1.jpg" target="_blank">brunelleschi1</a> Issued by Guinea in 2000 <a href="../images/brunelleschi2.jpg" target="_blank">brunelleschi2</a> <a id="Buffon"></a>BUFFON, Georges Louis Leclerc, Comte de <a class="mlink" data-popup="../../Biographies/Buffon/popup/" href="../../Biographies/Buffon/">Ⓑ</a> <a href="../Store/buffon.html" target="_blank">Ⓣ</a> Issued by France in 1949 <a href="../images/buffon.jpg" target="_blank">buffon</a> Issued by France in 2013 (Buffon Museum) <a href="../images/buffon3.jpg" target="_blank">buffon3</a> <a id="Caraca"></a>CARAÇA, Bento de Jesus <a class="mlink" data-popup="../../Biographies/Caraca/popup/" href="../../Biographies/Caraca/">Ⓑ</a> <a href="../Store/caraca.html" target="_blank">Ⓣ</a> Issued by Portugal in 2001 <a href="../images/caraca.jpg" target="_blank">caraca</a> <a id="Caratheodory"></a>CARATHÉODORY, Constantin <a class="mlink" data-popup="../../Biographies/Caratheodory/popup/" href="../../Biographies/Caratheodory/">Ⓑ</a> <a href="../Store/caratheodory.html" target="_blank">Ⓣ</a> Issued by Greece in 1994 <a href="../images/caratheodory.jpg" target="_blank">caratheodory</a> <a href="../images/caratheodory2.jpg" target="_blank">caratheodory2</a> <a id="Carnot"></a>CARNOT, Lazare <a class="mlink" data-popup="../../Biographies/Carnot/popup/" href="../../Biographies/Carnot/">Ⓑ</a> <a href="../Store/carnot.html" target="_blank">Ⓣ</a> Issued by France in 1950 <a href="../images/carnot1.jpg" target="_blank">carnot1</a> <a id="Carnot_Sadi"></a>CARNOT, Sadi <a class="mlink" data-popup="../../Biographies/Carnot_Sadi/popup/" href="../../Biographies/Carnot_Sadi/">Ⓑ</a> <a href="../Store/carnot_sadi.html" target="_blank">Ⓣ</a> Issued by France in 1954 <a href="../images/carnot_sadi1.jpg" target="_blank">carnot_sadi1</a> <a id="Casamayor"></a>CASAMAYOR DE LA COMA, María Andresa <a class="mlink" data-popup="../../Biographies/Casamayor/popup/" href="../../Biographies/Casamayor/">Ⓑ</a> <a href="../Store/casamayor.html" target="_blank">Ⓣ</a> Issued by Spain in 2020 <a href="../images/casamayor.jpg" target="_blank">casamayor</a> <a id="Cassini"></a>CASSINI, Giovanni Domenico <a class="mlink" data-popup="../../Biographies/Cassini/popup/" href="../../Biographies/Cassini/">Ⓑ</a> <a href="../Store/cassini.html" target="_blank">Ⓣ</a> Issued by St Pierre and Miquelon in 1968 <a href="../images/cassini5.jpg" target="_blank">cassini5</a> (See <a class="gllink" data-popup="../../Glossary/cassini_note/" href="../../Glossary/#cassini_note">THIS NOTE</a>) Issued by Mozambique in 2001 <a href="../images/cassini1.jpg" target="_blank">cassini1</a> Issued by Guinea in 2007 <a href="../images/cassini3.jpg" target="_blank">cassini3</a> Issued by Chad in 2009 <a href="../images/cassini4.jpg" target="_blank">cassini4</a> <a id="Cauchy"></a>CAUCHY, Augustin <a class="mlink" data-popup="../../Biographies/Cauchy/popup/" href="../../Biographies/Cauchy/">Ⓑ</a> <a href="../Store/cauchy.html" target="_blank">Ⓣ</a> Issued by France in 1989, on his 200th birthday <a href="../images/cauchy.jpg" target="_blank">cauchy</a> <a id="Cech"></a>CECH, Eduard <a class="mlink" data-popup="../../Biographies/Cech/popup/" href="../../Biographies/Cech/">Ⓑ</a> <a href="../Store/cech.html" target="_blank">Ⓣ</a> Issued by Czech Republic in 1993, part of a two-stamp series 'Personalities' <a href="../images/cech.jpg" target="_blank">cech</a> <a id="Celsius"></a>CELSIUS, Anders <a class="mlink" data-popup="../../Biographies/Celsius/popup/" href="../../Biographies/Celsius/">Ⓑ</a> <a href="../Store/celsius.html" target="_blank">Ⓣ</a> Issued by Sweden in 1982 <a href="../images/celsius1.jpg" target="_blank">celsius1</a> Issued by Nevis in 2000 <a href="../images/celsius2.jpg" target="_blank">celsius2</a> Issued by Macedonia in 2019 <a href="../images/celsius3.jpg" target="_blank">celsius3</a> <a id="Champollion">CHAMPOLLION, Jean François </a><a class="mlink" data-popup="../../Biographies/Champollion/popup/" href="../../Biographies/Champollion/">Ⓑ</a> <a href="../Store/champollion.html" target="_blank">Ⓣ</a> Issued by Egypt in 1972 <a href="../images/champollion3.jpg" target="_blank">champollion3</a> Issued by France in 1972, on the 150th anniversary of the deciphering of hieroglyphics <a href="../images/champollion1.jpg" target="_blank">champollion1</a> Issued by Monaco in 1990 <a href="../images/champollion2.jpg" target="_blank">champollion2</a> Issued by Egypt in 1999 <a href="../images/champollion5.jpg" target="_blank">champollion5</a> Issued by France in 1999 (his birthplace) <a href="../images/champollion6.jpg" target="_blank">champollion6</a> Issued by Central African Republic in 2002 <a href="../images/champollion4.jpg" target="_blank">champollion4</a> <a id="Chandrasekhar"></a>CHANDRASEKHAR, Subrahmanyan <a class="mlink" data-popup="../../Biographies/Chandrasekhar/popup/" href="../../Biographies/Chandrasekhar/">Ⓑ</a> <a href="../Store/chandrasekhar.html" target="_blank">Ⓣ</a> Issued by Sweden in 1987 <a href="../images/chandrasekhar2.jpg" target="_blank">chandrasekhar2</a> Issued by Guinea in 2006 <a href="../images/chandrasekhar1.jpg" target="_blank">chandrasekhar1</a> Issued by Guinea in 2008 <a href="../images/chandrasekhar4.jpg" target="_blank">chandrasekhar4</a> <a href="../images/chandrasekhar5.jpg" target="_blank">chandrasekhar5</a> Issued by Tuvalu in 2011 <a href="../images/chandrasekhar6.jpg" target="_blank">chandrasekhar6</a> <a id="Chaplygin"></a>CHAPLYGIN, Sergei <a class="mlink" data-popup="../../Biographies/Chaplygin/popup/" href="../../Biographies/Chaplygin/">Ⓑ</a> <a href="../Store/chaplygin.html" target="_blank">Ⓣ</a> Issued by Soviet Union in 1944, on the 75th anniversary of his birth <a href="../images/chaplygin1.jpg" target="_blank">chaplygin1</a> <a href="../images/chaplygin2.jpg" target="_blank">chaplygin2</a> <a id="Chatelet"></a>CHÂTELET, Émilie du <a class="mlink" data-popup="../../Biographies/Chatelet/popup/" href="../../Biographies/Chatelet/">Ⓑ</a> <a href="../Store/chatelet.html" target="_blank">Ⓣ</a> Issued by France in 2019 <a href="../images/chatelet1.jpg" target="_blank">chatelet1</a> <a id="Chebyshev"></a>CHEBYSHEV, Pafnuti Lvovich <a class="mlink" data-popup="../../Biographies/Chebyshev/popup/" href="../../Biographies/Chebyshev/">Ⓑ</a> <a href="../Store/chebyshev.html" target="_blank">Ⓣ</a> Issued by Soviet Union in 1946, on the 125th anniversary of his birth <a href="../images/cheby1.jpg" target="_blank">cheby1</a> (30 kopeck) <a href="../images/cheby2.jpg" target="_blank">cheby2</a> (60 kopeck) Issued by Russia in 2021, on his 200th birthday <a href="../images/chebyshev3.jpg" target="_blank">chebyshev3</a> (note the Chebyshev linkage) <a id="Chen_Jingrun"></a>CHEN JINGRUN <a class="mlink" data-popup="../../Biographies/Chen_Jingrun/popup/" href="../../Biographies/Chen_Jingrun/">Ⓑ</a> <a href="../Store/chen_jingrun.html" target="_blank">Ⓣ</a> Issued by China in 1999 <a href="../images/chen1.jpg" target="_blank">chen1</a> (Text has 'the best result of Goldbach's conjecture <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><msub><mi>P</mi><mi>x</mi></msub><mo stretchy="false">(</mo><mn>1</mn><mo separator="true">,</mo><mn>2</mn><mo stretchy="false">)</mo></mrow><annotation encoding="application/x-tex">P_{x}(1,2)</annotation></semantics></math>Px(1,2)...' ) Issued by China in 2020 <a href="../images/chen2.jpg" target="_blank">chen2</a> <a id="Choi_Seok-jeong"></a>CHOI SEOK-JEONG <a class="mlink" data-popup="../../Biographies/Choi_Seok-jeong/popup/" href="../../Biographies/Choi_Seok-jeong/">Ⓑ</a> <a href="../Store/choi_seok-jeong.html" target="_blank">Ⓣ</a> Issued by South Korea in 2019 <a href="../images/magic9.jpg" target="_blank">magic9</a> <a id="Clavius"></a>CLAVIUS, Christopher <a class="mlink" data-popup="../../Biographies/Clavius/popup/" href="../../Biographies/Clavius/">Ⓑ</a> <a href="../Store/clavius.html" target="_blank">Ⓣ</a> Issued by Vatican City in 1982, showing the tomb of Pope Gregory XIII in St Peter's Basilica, which includes a relief showing Clavius kneeling before the Pope, presenting his work as the Pope promulgates the new calendar in 1582 <a href="../images/clavius2.jpg" target="_blank">clavius2</a> <a href="../images/clavius2a.jpg" target="_blank">clavius2a</a> Issued by Vatican City in 2012 <a href="../images/clavius.jpg" target="_blank">clavius</a> <a id="Comte"></a>COMTE, Auguste <a href="../Store/comte.html" target="_blank">Ⓣ</a> Issued by Brazil in 1957 <a href="../images/comte3.jpg" target="_blank">comte3</a> Issued by Bulgaria in 1957 <a href="../images/comte4.jpg" target="_blank">comte4</a> Issued by France in 1957, on the centenary of his death <a href="../images/comte.jpg" target="_blank">comte</a> Issued by Romania in 1957 <a href="../images/comte2.jpg" target="_blank">comte2</a> Issued by Bosnia and Herzegovina in 2023 <a href="../images/compte5.jpg" target="_blank">compte5</a> <a id="Condorcet"></a>CONDORCET, Marquis de <a class="mlink" data-popup="../../Biographies/Condorcet/popup/" href="../../Biographies/Condorcet/">Ⓑ</a> <a href="../Store/condorcet.html" target="_blank">Ⓣ</a> Issued by France in 1989, one of a series of stamps issued on the bicentennial of the French Revolution <a href="../images/condor.jpg" target="_blank">condor</a> <a id="Connes"></a>CONNES, Alain <a class="mlink" data-popup="../../Biographies/Connes/popup/" href="../../Biographies/Connes/">Ⓑ</a> <a href="../Store/connes.html" target="_blank">Ⓣ</a> Issued by Guinea in 2008 <a href="../images/connes.jpg" target="_blank">connes</a> <a id="Copernicus"></a>COPERNICUS, Nicolaus <a class="mlink" data-popup="../../Biographies/Copernicus/popup/" href="../../Biographies/Copernicus/">Ⓑ</a> <a href="../Store/copernicus.html" target="_blank">Ⓣ</a> Issued by Poland in 1923 <a href="../images/copernicus5.jpg" target="_blank">copernicus5</a> <a href="../images/copernicus6.jpg" target="_blank">copernicus6</a> Issued by Poland in 1942 (under German occupation) <a href="../images/copernicus4.jpg" target="_blank">copernicus4</a> Issued by Poland in 1943 (under German occupation) <a href="../images/copernicus9.jpg" target="_blank">copernicus9</a> Issued by Poland in 1951 <a href="../images/copernicus97.jpg" target="_blank">copernicus97</a> Issued by China in 1953 <a href="../images/copernicus74.jpg" target="_blank">copernicus74</a> Issued by Poland in 1953 <a href="../images/copernicus36.jpg" target="_blank">copernicus36</a> <a href="../images/copernicus37.jpg" target="_blank">copernicus37</a> Issued by Poland in 1955 <a href="../images/copernicus48.jpg" target="_blank">copernicus48</a> Issued by Soviet Union in 1955 <a href="../images/copernicus39.jpg" target="_blank">copernicus39</a> (Inset is Jan Matejko: the painter of the Copernicus picture) Issued by France in 1957 <a href="../images/copernicus30.jpg" target="_blank">copernicus30</a> Issued by Poland in 1959 <a href="../images/copernicus134.jpg" target="_blank">copernicus134</a> Issued by Poland in 1964 <a href="../images/copernicus98.jpg" target="_blank">copernicus98</a> Issued by Poland in 1965 (a banknote) <a href="../images/copernicus41.jpg" target="_blank">copernicus41</a> <a href="../images/copernicus42.jpg" target="_blank">copernicus42</a> (The reverse, showing the Zodiac) Issued by Poland in 1969 <a href="../images/copernicus38.jpg" target="_blank">copernicus38</a> ("The sun stops, the earth moves") <a href="../images/copernicus99.jpg" target="_blank">copernicus99</a> <a href="../images/copernicus100.jpg" target="_blank">copernicus100</a> Issued by Yemen in 1969 <a href="../images/copernicus132.jpg" target="_blank">copernicus132</a> Issued by Poland in 1970 <a href="../images/copernicus49.jpg" target="_blank">copernicus49</a> <a href="../images/copernicus102.jpg" target="_blank">copernicus102</a> <a href="../images/copernicus103.jpg" target="_blank">copernicus103</a> Issued by Ajman in 1971 <a href="../images/copernicus133.jpg" target="_blank">copernicus133</a> Issued by Poland in 1971 <a href="../images/copernicus50.jpg" target="_blank">copernicus50</a> <a href="../images/copernicus104.jpg" target="_blank">copernicus104</a> <a href="../images/copernicus105.jpg" target="_blank">copernicus105</a> <a href="../images/copernicus106.jpg" target="_blank">copernicus106</a> Issued by Poland in 1972 <a href="../images/copernicus51.jpg" target="_blank">copernicus51</a> <a href="../images/copernicus52.jpg" target="_blank">copernicus52</a> <a href="../images/copernicus107.jpg" target="_blank">copernicus107</a> <a href="../images/copernicus108.jpg" target="_blank">copernicus108</a> <a href="../images/copernicus109.jpg" target="_blank">copernicus109</a> <a href="../images/copernicus110.jpg" target="_blank">copernicus110</a> <a href="../images/copernicus111.jpg" target="_blank">copernicus111</a> Issued by Albania in 1973 <a href="../images/copernicus57.jpg" target="_blank">copernicus57</a> <a href="../images/copernicus58.jpg" target="_blank">copernicus58</a> <a href="../images/copernicus59.jpg" target="_blank">copernicus59</a> <a href="../images/copernicus60.jpg" target="_blank">copernicus60</a> <a href="../images/copernicus61.jpg" target="_blank">copernicus61</a> <a href="../images/copernicus62.jpg" target="_blank">copernicus62</a> Issued by Bangladesh in 1973 <a href="../images/copernicus18.jpg" target="_blank">copernicus18</a> Issued by Benin in 1973 (as Dahomey) <a href="../images/copernicus81.jpg" target="_blank">copernicus81</a> <a href="../images/copernicus82.jpg" target="_blank">copernicus82</a> Issued by Brazil in 1973 <a href="../images/copernicus67.jpg" target="_blank">copernicus67</a> Issued by Bulgaria in 1973 <a href="../images/copernicus68.jpg" target="_blank">copernicus68</a> Issued by Burundi in 1973 <a href="../images/copernicus.jpg" target="_blank">copernicus</a> <a href="../images/copernicus25.jpg" target="_blank">copernicus25</a> <a href="../images/copernicus69.jpg" target="_blank">copernicus69</a> Issued by Cameroon in 1973 <a href="../images/copernicus70.jpg" target="_blank">copernicus70</a> Issued by Central African Republic in 1973 <a href="../images/copernicus71.jpg" target="_blank">copernicus71</a> Issued by Chad in 1973 <a href="../images/copernicus73.jpg" target="_blank">copernicus73</a> Issued by Colombia in 1973 <a href="../images/copernicus75.jpg" target="_blank">copernicus75</a> Issued by Cuba in 1973 <a href="../images/copernicus45.jpg" target="_blank">copernicus45</a> <a href="../images/copernicus79.jpg" target="_blank">copernicus79</a> <a href="../images/copernicus80.jpg" target="_blank">copernicus80</a> Issued by Djibouti in 1973 (as French Territory of the Afars and the Issas) <a href="../images/copernicus12.jpg" target="_blank">copernicus12</a> Issued by Equatorial Guinea in 1973 <a href="../images/copernicus20.jpg" target="_blank">copernicus20</a> Issued by French Polynesia in 1973 <a href="../images/copernicus117.jpg" target="_blank">copernicus117</a> Issued by German Democratic Republic in 1973 <a href="../images/copernicus26.jpg" target="_blank">copernicus26</a> Issued by Germany in 1973 <a href="../images/copernicus10.jpg" target="_blank">copernicus10</a> Issued by Haiti in 1973 <a href="../images/copernicus84.jpg" target="_blank">copernicus84</a> Issued by Hungary in 1973 <a href="../images/copernicus35.jpg" target="_blank">copernicus35</a> Issued by India in 1973 <a href="../images/copernicus86.jpg" target="_blank">copernicus86</a> Issued by Liberia in 1973 <a href="../images/copernicus28.jpg" target="_blank">copernicus28</a> <a href="../images/copernicus135.jpg" target="_blank">copernicus135</a> Issued by Libya in 1973 <a href="../images/copernicus87.jpg" target="_blank">copernicus87</a> <a href="../images/copernicus88.jpg" target="_blank">copernicus88</a> Issued by Maldives in 1973 <a href="../images/copernicus47.jpg" target="_blank">copernicus47</a> <a href="../images/copernicus90.jpg" target="_blank">copernicus90</a> Issued by Mali in 1973 <a href="../images/copernicus91.jpg" target="_blank">copernicus91</a> Issued by Mexico in 1973 <a href="../images/copernicus17.jpg" target="_blank">copernicus17</a> Issued by Mongolia in 1973 <a href="../images/copernicus3.jpg" target="_blank">copernicus3</a> <a href="../images/copernicus7.jpg" target="_blank">copernicus7</a> <a href="../images/copernicus40.jpg" target="_blank">copernicus40</a> Issued by Niger in 1973 <a href="../images/copernicus93.jpg" target="_blank">copernicus93</a> Issued by Pakistan in 1973 <a href="../images/copernicus29.jpg" target="_blank">copernicus29</a> Issued by Paraguay in 1973 <a href="../images/copernicus95.jpg" target="_blank">copernicus95</a> <a href="../images/copernicus96.jpg" target="_blank">copernicus96</a> Issued by Poland in 1973 <a href="../images/copernicus53.jpg" target="_blank">copernicus53</a> <a href="../images/copernicus54.jpg" target="_blank">copernicus54</a> <a href="../images/copernicus112.jpg" target="_blank">copernicus112</a> <a href="../images/copernicus113.jpg" target="_blank">copernicus113</a> Issued by Republic of the Congo in 1973 <a href="../images/copernicus78.jpg" target="_blank">copernicus78</a> Issued by Romania in 1973 <a href="../images/copernicus55.jpg" target="_blank">copernicus55</a> Issued by Rwanda in 1973 <a href="../images/copernicus118.jpg" target="_blank">copernicus118</a> <a href="../images/copernicus119.jpg" target="_blank">copernicus119</a> <a href="../images/copernicus120.jpg" target="_blank">copernicus120</a> <a href="../images/copernicus121.jpg" target="_blank">copernicus121</a> <a href="../images/copernicus19.jpg" target="_blank">copernicus19</a> <a href="../images/copernicus56.jpg" target="_blank">copernicus56</a> Issued by Soviet Union in 1973 <a href="../images/copernicus122.jpg" target="_blank">copernicus122</a> Issued by Syria in 1973 <a href="../images/copernicus123.jpg" target="_blank">copernicus123</a> Issued by Togo in 1973 <a href="../images/copernicus124.jpg" target="_blank">copernicus124</a> Issued by Tunisia in 1973 <a href="../images/copernicus125.jpg" target="_blank">copernicus125</a> Issued by Uruguay in 1973 <a href="../images/copernicus126.jpg" target="_blank">copernicus126</a> Issued by USA in 1973 <a href="../images/copernicus31.jpg" target="_blank">copernicus31</a> Issued by Vatican City in 1973 <a href="../images/copernicus32.jpg" target="_blank">copernicus32</a> <a href="../images/copernicus33.jpg" target="_blank">copernicus33</a> <a href="../images/copernicus34a.jpg" target="_blank">copernicus34a</a> <a href="../images/copernicus34b.jpg" target="_blank">copernicus34b</a> <a href="../images/copernicus127.jpg" target="_blank">copernicus127</a> <a href="../images/copernicus128.jpg" target="_blank">copernicus128</a> Issued by Venezuela in 1973 <a href="../images/copernicus27.jpg" target="_blank">copernicus27</a> Issued by Vietnam in 1973 <a href="../images/copernicus14.jpg" target="_blank">copernicus14</a> <a href="../images/copernicus129.jpg" target="_blank">copernicus129</a> <a href="../images/copernicus130.jpg" target="_blank">copernicus130</a> Issued by Bangladesh in 1974 <a href="../images/copernicus63.jpg" target="_blank">copernicus63</a> <a href="../images/copernicus64.jpg" target="_blank">copernicus64</a> Issued by France in 1974 <a href="../images/copernicus46.jpg" target="_blank">copernicus46</a> Issued by Madagascar in 1974 <a href="../images/copernicus89.jpg" target="_blank">copernicus89</a> Issued by Comoros in 1975 <a href="../images/copernicus76.jpg" target="_blank">copernicus76</a> <a href="../images/copernicus24.jpg" target="_blank">copernicus24</a> Issued by Czechoslovakia in 1975 <a href="../images/copernicus2.jpg" target="_blank">copernicus2</a> Issued by Comoros in 1979 <a href="../images/copernicus77.jpg" target="_blank">copernicus77</a> Issued by Benin in 1980 <a href="../images/copernicus65.jpg" target="_blank">copernicus65</a> Issued by Poland in 1982 (a banknote) <a href="../images/copernicus43.jpg" target="_blank">copernicus43</a> <a href="../images/copernicus44.jpg" target="_blank">copernicus44</a> (The reverse, showing the planets) Issued by Central African Republic in 1985 <a href="../images/copernicus72.jpg" target="_blank">copernicus72</a> Issued by Grenada in 1985 <a href="../images/copernicus83.jpg" target="_blank">copernicus83</a> Issued by Comoros in 1988 <a href="../images/copernicus15.jpg" target="_blank">copernicus15</a> Issued by Bolivia in 1992 <a href="../images/copernicus66.jpg" target="_blank">copernicus66</a> Issued by Poland in 1992 <a href="../images/copernicus114.jpg" target="_blank">copernicus114</a> Issued by Gabon in 1993 <a href="../images/copernicus23.jpg" target="_blank">copernicus23</a> Issued by Hungary in 1993 <a href="../images/copernicus85.jpg" target="_blank">copernicus85</a> Issued by Mongolia in 1993 <a href="../images/copernicus92.jpg" target="_blank">copernicus92</a> Issued by New Caledonia in 1993 <a href="../images/copernicus94.jpg" target="_blank">copernicus94</a> Issued by Poland in 1993 <a href="../images/copernicus115.jpg" target="_blank">copernicus115</a> Issued by Wallis and Futuna in 1993 <a href="../images/copernicus131.jpg" target="_blank">copernicus131</a> Issued by Paraguay in 1994 <a href="../images/copernicus21.jpg" target="_blank">copernicus21</a> Issued by Guinea in 2000 <a href="../images/copernicus16.jpg" target="_blank">copernicus16</a> <a href="../images/copernicus22.jpg" target="_blank">copernicus22</a> Issued by Poland in 2003 <a href="../images/copernicus116.jpg" target="_blank">copernicus116</a> Issued by Bosnia and Herzegovina in 2023 <a href="../images/copernicus136.jpg" target="_blank">copernicus136</a> <a id="Coulomb"></a>COULOMB, Charles de <a class="mlink" data-popup="../../Biographies/Coulomb/popup/" href="../../Biographies/Coulomb/">Ⓑ</a> <a href="../Store/coulomb.html" target="_blank">Ⓣ</a> Issued by France in 1961 <a href="../images/coulomb1.jpg" target="_blank">coulomb1</a> <a id="Csere">CSERE, János </a><a href="../Store/csere.html" target="_blank">Ⓣ</a> Issued by Hungary in 1954 <a href="../images/csere1.jpg" target="_blank">csere1</a> <a id="Cusa"></a>CUSA, Nicolas of <a class="mlink" data-popup="../../Biographies/Cusa/popup/" href="../../Biographies/Cusa/">Ⓑ</a> <a href="../Store/cusa.html" target="_blank">Ⓣ</a> Issued by Germany in 1958 <a href="../images/cusa1.jpg" target="_blank">cusa1</a> Issued by Vatican City in 1964 <a href="../images/cusa3.jpg" target="_blank">cusa3</a> <a href="../images/cusa4.jpg" target="_blank">cusa4</a> Issued by Transkei in 1984 <a href="../images/cusa2.jpg" target="_blank">cusa2</a> <a id="DAlembert"></a>D'ALEMBERT, Jean Baptiste le Rond <a class="mlink" data-popup="../../Biographies/DAlembert/popup/" href="../../Biographies/DAlembert/">Ⓑ</a> <a href="../Store/dalembert.html" target="_blank">Ⓣ</a> Issued by France in 1824 (a medal by Depaulis) <a href="../images/dalemb2.jpg" target="_blank">dalemb2</a> Issued by France in 1959, part of a series Famous Frenchmen, issued to benefit the Red Cross <a href="../images/dalemb.jpg" target="_blank">dalemb</a> <a id="Davidoglu"></a>DAVIDOGLU, Anton <a class="mlink" data-popup="../../Biographies/Davidoglu/popup/" href="../../Biographies/Davidoglu/">Ⓑ</a> <a href="../Store/davidoglu.html" target="_blank">Ⓣ</a> Issued by Romania in 1976, on his 200th birthday <a href="../images/davidoglu.jpg" target="_blank">davidoglu</a> <a id="Broglie"></a>DE BROGLIE, Louis <a class="mlink" data-popup="../../Biographies/Broglie/popup/" href="../../Biographies/Broglie/">Ⓑ</a> <a href="../Store/broglie.html" target="_blank">Ⓣ</a> Issued by Sweden in 1982 <a href="../images/broglie5.jpg" target="_blank">broglie5</a> Issued by France in 1994 <a href="../images/broglie3.jpg" target="_blank">broglie3</a> Issued by Maldives in 1995 <a href="../images/broglie4.jpg" target="_blank">broglie4</a> Issued by Uganda in 1995 <a href="../images/broglie2.jpg" target="_blank">broglie2</a> <a id="Dedekind"></a>DEDEKIND, Richard <a class="mlink" data-popup="../../Biographies/Dedekind/popup/" href="../../Biographies/Dedekind/">Ⓑ</a> <a href="../Store/dedekind.html" target="_blank">Ⓣ</a> Issued by German Democratic Republic in 1981, one of a series of six stamps, 'Important Persons' <a href="../images/dedekind.jpg" target="_blank">dedekind</a> <a id="Deligne"></a>DELIGNE, Pierre <a class="mlink" data-popup="../../Biographies/Deligne/popup/" href="../../Biographies/Deligne/">Ⓑ</a> <a href="../Store/deligne.html" target="_blank">Ⓣ</a> Issued by Belgium in 2007 <a href="../images/deligne1.jpg" target="_blank">deligne1</a> <a href="../images/deligne2.jpg" target="_blank">deligne2</a> <a href="../images/deligne3.jpg" target="_blank">deligne3</a> <a href="../images/deligne4.jpg" target="_blank">deligne4</a> (Important note: images 1 and 2 are the specimens; 3 and 4 are the actual stamps. The specimens have the wrong denomination -- 0,60 rather than 0,70 -- but are included here because they have better quality than the actual stamps.) <a id="Democritus"></a>DEMOCRITUS <a class="mlink" data-popup="../../Biographies/Democritus/popup/" href="../../Biographies/Democritus/">Ⓑ</a> <a href="../Store/democritus.html" target="_blank">Ⓣ</a> Issued by Greece in 1955 (a banknote) <a href="../images/democritus6.jpg" target="_blank">democritus6</a> Issued by Greece in 1961, honouring the 'Democritus' National Center for Scientific Research <a href="../images/democ2.jpg" target="_blank">democ2</a> <a href="../images/democ3.jpg" target="_blank">democ3</a> Issued by Greece in 1967 (a banknote) <a href="../images/democritus4.jpg" target="_blank">democritus4</a> Issued by Greece in 1982 (a coin) <a href="../images/democritus5.jpg" target="_blank">democritus5</a> Issued by Greece in 1983, to honour an International Conference on Democritus and his work <a href="../images/democ1.jpg" target="_blank">democ1</a> <a id="Descartes"></a>DESCARTES, Rene <a class="mlink" data-popup="../../Biographies/Descartes/popup/" href="../../Biographies/Descartes/">Ⓑ</a> <a href="../Store/descartes.html" target="_blank">Ⓣ</a> Issued by France in 1846 (a medal by Rogat) <a href="../images/descartes10.jpg" target="_blank">descartes10</a> Issued by France in 1937, in commemoration of the third centenary of the publication of Discours de la Méthode <a href="../images/descart.jpg" target="_blank">descart</a> (shows 'Discours sur la Méthode') <a href="../images/descart2.jpg" target="_blank">descart2</a> (reissue, shows 'Discours de la Méthode') Issued by France in 1942 (a banknote) <a href="../images/descartes12.jpg" target="_blank">descartes12</a> Issued by France in 1991, a 100-franc coin <a href="../images/descartes9.jpg" target="_blank">descartes9</a> Issued by Albania in 1996 <a href="../images/descart4.jpg" target="_blank">descart4</a> (This stamp features a misspelling of the Latin form of Descartes, which should be Cartesius) Issued by France in 1996, on the 400th anniversary of his birth <a href="../images/descart3.jpg" target="_blank">descart3</a> <a href="../images/descartes8.jpg" target="_blank">descartes8</a> (a medallion) Issued by Monaco in 1996, on his 400th birth anniversary <a href="../images/descart7.jpg" target="_blank">descart7</a> Issued by Grenada in 2000 <a href="../images/descart5.jpg" target="_blank">descart5</a> Issued by Sierra Leone in 2000 <a href="../images/descart6.jpg" target="_blank">descart6</a> Issued by Macedonia in 2021 <a href="../images/descartes14.jpg" target="_blank">descartes14</a> <a id="De_Witt"></a>DE WITT, Johan <a class="mlink" data-popup="../../Biographies/De_Witt/popup/" href="../../Biographies/De_Witt/">Ⓑ</a> <a href="../Store/de_witt.html" target="_blank">Ⓣ</a> Issued by Netherlands in 1948 <a href="../images/dewitt1.jpg" target="_blank">dewitt1</a> <a id="Dirac"></a>DIRAC, Paul <a class="mlink" data-popup="../../Biographies/Dirac/popup/" href="../../Biographies/Dirac/">Ⓑ</a> <a href="../Store/dirac.html" target="_blank">Ⓣ</a> Issued by Sweden in 1982 <a href="../images/dirac3.jpg" target="_blank">dirac3</a> Issued by Guyana in 1995 <a href="../images/dirac1.jpg" target="_blank">dirac1</a> Issued by Sierra Leone in 2017 <a href="../images/dirac6.jpg" target="_blank">dirac6</a> <a id="Dodgson"></a>DODGSON, Charles <a class="mlink" data-popup="../../Biographies/Dodgson/popup/" href="../../Biographies/Dodgson/">Ⓑ</a> <a href="../Store/dodgson.html" target="_blank">Ⓣ</a> Issued by Mali in 1982 <a href="../images/dodgson1.jpg" target="_blank">dodgson1</a> Issued by Mali in 1982 <a href="../images/dodgson3.jpg" target="_blank">dodgson3</a> <a href="../images/dodgson4.jpg" target="_blank">dodgson4</a> Issued by St Helena in 2001 <a href="../images/dodgson2.jpg" target="_blank">dodgson2</a> <a id="Donaldson"></a>DONALDSON, Simon <a class="mlink" data-popup="../../Biographies/Donaldson/popup/" href="../../Biographies/Donaldson/">Ⓑ</a> <a href="../Store/donaldson.html" target="_blank">Ⓣ</a> Issued by Guinea in 2008 <a href="../images/donaldson.jpg" target="_blank">donaldson</a> <a id="Doppler"></a>DOPPLER, Christian <a class="mlink" data-popup="../../Biographies/Doppler/popup/" href="../../Biographies/Doppler/">Ⓑ</a> <a href="../Store/doppler.html" target="_blank">Ⓣ</a> Issued by Austria in 1992 <a href="../images/doppler1.jpg" target="_blank">doppler1</a> <a id="Drinfeld"></a>DRINFELD, Vladimir <a class="mlink" data-popup="../../Biographies/Drinfeld/popup/" href="../../Biographies/Drinfeld/">Ⓑ</a> <a href="../Store/drinfeld.html" target="_blank">Ⓣ</a> Issued by Guinea in 2008 <a href="../images/drinfeld.jpg" target="_blank">drinfeld</a> <a id="Durer"></a>DÜRER, Albrecht <a class="mlink" data-popup="../../Biographies/Durer/popup/" href="../../Biographies/Durer/">Ⓑ</a> <a href="../Store/durer.html" target="_blank">Ⓣ</a> Issued by Germany in 1926 <a href="../images/durer12.jpg" target="_blank">durer12</a> Issued by Austria in 1935 for Mothers' Day <a href="../images/durer27.jpg" target="_blank">durer27</a> Issued by Germany in 1939 <a href="../images/durer26.jpg" target="_blank">durer26</a> Issued by Saarland in 1954 <a href="../images/durer42.jpg" target="_blank">durer42</a> Issued by German Democratic Republic in 1955 <a href="../images/durer28.jpg" target="_blank">durer28</a> Issued by Saarland in 1955 <a href="../images/durer43.jpg" target="_blank">durer43</a> <a href="../images/durer44.jpg" target="_blank">durer44</a> <a href="../images/durer45.jpg" target="_blank">durer45</a> Issued by German Democratic Republic in 1960 <a href="../images/durer53.jpg" target="_blank">durer53</a> Issued by Germany in 1961 <a href="../images/durer1.jpg" target="_blank">durer1</a> Issued by Panama in 1966 <a href="../images/durer40.jpg" target="_blank">durer40</a> Issued by Niger in 1967 <a href="../images/durer17.jpg" target="_blank">durer17</a> Issued by Panama in 1967 <a href="../images/durer21.jpg" target="_blank">durer21</a> Issued by Saudi Arabia in 1967 <a href="../images/durer41.jpg" target="_blank">durer41</a> Issued by Ajman in 1968 <a href="../images/durer29.jpg" target="_blank">durer29</a> <a href="../images/durer30.jpg" target="_blank">durer30</a> <a href="../images/durer32.jpg" target="_blank">durer32</a> Issued by Ajman in 1968 <a href="../images/durer50.jpg" target="_blank">durer50</a> Issued by United Arab Emirates in 1968 <a href="../images/durer58.jpg" target="_blank">durer58</a> Issued by Czechoslovakia in 1969 <a href="../images/durer61.jpg" target="_blank">durer61</a> Issued by Ajman in 1970 <a href="../images/durer51.jpg" target="_blank">durer51</a> Issued by Ajman in 1971 <a href="../images/durer52.jpg" target="_blank">durer52</a> Issued by Albania in 1971 <a href="../images/durer14.jpg" target="_blank">durer14</a> Issued by Austria in 1971 <a href="../images/durer60.jpg" target="_blank">durer60</a> Issued by Benin in 1971 (as Dahomey) <a href="../images/durer4.jpg" target="_blank">durer4</a> <a href="../images/durer5.jpg" target="_blank">durer5</a> Issued by Burundi in 1971 <a href="../images/durer10.jpg" target="_blank">durer10</a> Issued by Dubai in 1971 <a href="../images/durer2.jpg" target="_blank">durer2</a> Issued by German Democratic Republic in 1971 <a href="../images/durer11.jpg" target="_blank">durer11</a> <a href="../images/durer55.jpg" target="_blank">durer55</a> <a href="../images/durer56.jpg" target="_blank">durer56</a> Issued by Germany in 1971 <a href="../images/durer6.jpg" target="_blank">durer6</a> Issued by Romania in 1971 <a href="../images/durer18.jpg" target="_blank">durer18</a> Issued by Rwanda in 1971 <a href="../images/durer54.jpg" target="_blank">durer54</a> Issued by United Arab Emirates in 1971 <a href="../images/durer46.jpg" target="_blank">durer46</a> <a href="../images/durer47.jpg" target="_blank">durer47</a> Issued by West Berlin in 1971 <a href="../images/durer20.jpg" target="_blank">durer20</a> Issued by Ajman in 1972 <a href="../images/durer31.jpg" target="_blank">durer31</a> <a href="../images/durer48.jpg" target="_blank">durer48</a> <a href="../images/durer62.jpg" target="_blank">durer62</a> Issued by Germany in 1972 <a href="../images/durer38.jpg" target="_blank">durer38</a> Issued by United Arab Emirates in 1972 <a href="../images/durer49.jpg" target="_blank">durer49</a> Issued by Germany in 1977 (a banknote) <a href="../images/durer22.jpg" target="_blank">durer22</a> Issued by Democratic Republic of the Congo in 1978 <a href="../images/durer19.jpg" target="_blank">durer19</a> (as Zaire) Issued by Djibouti in 1978 <a href="../images/durer63.jpg" target="_blank">durer63</a> Issued by Ghana in 1978 <a href="../images/durer64.jpg" target="_blank">durer64</a> Issued by Hungary in 1978 <a href="../images/durer8.jpg" target="_blank">durer8</a> Issued by Mongolia in 1978 <a href="../images/durer3.jpg" target="_blank">durer3</a> Issued by Paraguay in 1978 <a href="../images/durer65.jpg" target="_blank">durer65</a> Issued by Republic of the Congo in 1978 <a href="../images/durer15.jpg" target="_blank">durer15</a> Issued by France in 1980 <a href="../images/durer16.jpg" target="_blank">durer16</a> Issued by Germany in 1980 (a banknote) <a href="../images/durer24.jpg" target="_blank">durer24</a> (from a Dürer portrait) Issued by Cook Islands in 1986, engraving of Melancholia <a href="../images/melancholia.jpg" target="_blank">melancholia</a> Issued by Soviet Union in 1987 <a href="../images/durer36.jpg" target="_blank">durer36</a> Issued by German Democratic Republic in 1990 <a href="../images/durer57.jpg" target="_blank">durer57</a> Issued by Germany in 1990 <a href="../images/durer37.jpg" target="_blank">durer37</a> Issued by Sweden in 1992 <a href="../images/durer35.jpg" target="_blank">durer35</a> Issued by Angola in 2000 <a href="../images/melancholia2.jpg" target="_blank">melancholia2</a> Issued by Guinea-Bissau in 2003 <a href="../images/durer13.jpg" target="_blank">durer13</a> Issued by Germany in 2006 <a href="../images/durer7.jpg" target="_blank">durer7</a> Issued by Djibouti in 2007, engraving of Melancholia <a href="../images/melancholia3.jpg" target="_blank">melancholia3</a> Issued by Germany in 2008 <a href="../images/durer39.jpg" target="_blank">durer39</a> Issued by Niger in 2016 <a href="../images/durer33.jpg" target="_blank">durer33</a> Issued by Austria in 2017 <a href="../images/durer59.jpg" target="_blank">durer59</a> <a id="Eckert_John"></a>ECKERT, J Prosper <a class="mlink" data-popup="../../Biographies/Eckert_John/popup/" href="../../Biographies/Eckert_John/">Ⓑ</a> <a href="../Store/eckert_john.html" target="_blank">Ⓣ</a> Issued by Madagascar in 1990 <a href="../images/mauchlyeckert1.jpg" target="_blank">mauchlyeckert1</a> <a id="Eddington"></a>EDDINGTON, Arthur <a class="mlink" data-popup="../../Biographies/Eddington/popup/" href="../../Biographies/Eddington/">Ⓑ</a> <a href="../Store/eddington.html" target="_blank">Ⓣ</a> Issued by Sao Tome and Principe in 1990 <a href="../images/eddington_einstein.jpg" target="_blank">eddington_einstein</a> Issued by Guinea in 2008 <a href="../images/eddington3.jpg" target="_blank">eddington3</a> Issued by Sao Tome and Principe in 2009 <a href="../images/eddington1.jpg" target="_blank">eddington1</a> <a href="../images/eddington2.jpg" target="_blank">eddington2</a> <a id="Einstein"></a>EINSTEIN, Albert <a class="mlink" data-popup="../../Biographies/Einstein/popup/" href="../../Biographies/Einstein/">Ⓑ</a> <a href="../Store/einstein.html" target="_blank">Ⓣ</a> Issued by Israel in 1956 <a href="../images/einstein28.jpg" target="_blank">einstein28</a> Issued by Poland in 1959 <a href="../images/einstein35.jpg" target="_blank">einstein35</a> Issued by USA in 1965 <a href="../images/einstein36.jpg" target="_blank">einstein36</a> Issued by Israel in 1968 (a banknote) <a href="../images/einstein29.jpg" target="_blank">einstein29</a> Issued by Argentina in 1971 <a href="../images/einstein18.jpg" target="_blank">einstein18</a> Issued by Switzerland in 1972 <a href="../images/einstein14.jpg" target="_blank">einstein14</a> Issued by Mali in 1975 <a href="../images/einstein9.jpg" target="_blank">einstein9</a> Issued by Democratic Republic of the Congo in 1979 <a href="../images/einstein22.jpg" target="_blank">einstein22</a> (as Zaire) Issued by German Democratic Republic in 1979 <a href="../images/einstein38.jpg" target="_blank">einstein38</a> Issued by Italy in 1979 <a href="../images/einstein24.jpg" target="_blank">einstein24</a> Issued by Monaco in 1979 <a href="../images/einstein25.jpg" target="_blank">einstein25</a> Issued by Soviet Union in 1979 <a href="../images/einstein39.jpg" target="_blank">einstein39</a> Issued by Togo in 1979 <a href="../images/einstein26.jpg" target="_blank">einstein26</a> Issued by USA in 1979 <a href="../images/einstein17.jpg" target="_blank">einstein17</a> Issued by Cook Islands in 1980 <a href="../images/einstein41.jpg" target="_blank">einstein41</a> Issued by Uganda in 1987 <a href="../images/einstein37.jpg" target="_blank">einstein37</a> Issued by Gibraltar in 1998 <a href="../images/einstein23.jpg" target="_blank">einstein23</a> Issued by Portugal in 2000 <a href="../images/planck_einstein_bohr.jpg" target="_blank">planck_einstein_bohr</a> (with Planck and Bohr) Issued by Tadjikistan in 2000 <a href="../images/einstein21.jpg" target="_blank">einstein21</a> Issued by Belgium in 2001 <a href="../images/einstein19.jpg" target="_blank">einstein19</a> Issued by Republic of the Congo in 2001 <a href="../images/einstein1.jpg" target="_blank">einstein1</a> Issued by Czech Republic in 2005 <a href="../images/einstein2.jpg" target="_blank">einstein2</a> Issued by Fiji in 2005 <a href="../images/einstein30.jpg" target="_blank">einstein30</a> <a href="../images/einstein31.jpg" target="_blank">einstein31</a> <a href="../images/einstein32.jpg" target="_blank">einstein32</a> <a href="../images/einstein33.jpg" target="_blank">einstein33</a> Issued by France in 2005 <a href="../images/einstein3.jpg" target="_blank">einstein3</a> Issued by Germany in 2005 <a href="../images/einstein4.jpg" target="_blank">einstein4</a> Issued by Israel in 2005 <a href="../images/einstein6.jpg" target="_blank">einstein6</a> <a href="../images/einstein7.jpg" target="_blank">einstein7</a> Issued by Lesotho in 2005 <a href="../images/einstein8.jpg" target="_blank">einstein8</a> Issued by Lesotho in 2005 <a href="../images/einstein42.jpg" target="_blank">einstein42</a> Issued by Macedonia in 2005 <a href="../images/einstein11.jpg" target="_blank">einstein11</a> Issued by Mexico in 2005 <a href="../images/einstein10.jpg" target="_blank">einstein10</a> Issued by Spain in 2005 <a href="../images/einstein13.jpg" target="_blank">einstein13</a> Issued by Switzerland in 2005 <a href="../images/einstein15.jpg" target="_blank">einstein15</a> Issued by Tunisia in 2005 <a href="../images/einstein16.jpg" target="_blank">einstein16</a> Issued by Guinea-Bissau in 2008 <a href="../images/einstein20.jpg" target="_blank">einstein20</a> Issued by Grenada in 2011 <a href="../images/einstein5.jpg" target="_blank">einstein5</a> Issued by Jersey in 2016 <a href="../images/einstein34.jpg" target="_blank">einstein34</a> <a href="../images/einstein40.jpg" target="_blank">einstein40</a> <a id="Eotvos"></a>EÖTVÖS, Lóránd <a class="mlink" data-popup="../../Biographies/Eotvos/popup/" href="../../Biographies/Eotvos/">Ⓑ</a> <a href="../Store/eotvos.html" target="_blank">Ⓣ</a> Issued by Hungary in 1932 <a href="../images/eotvos2.jpg" target="_blank">eotvos2</a> Issued by Hungary in 1948 (100th anniversary of birth) <a href="../images/eotvos3.jpg" target="_blank">eotvos3</a> Issued by Hungary in 1959 (Eötvös torsion balance) <a href="../images/eotvos4.jpg" target="_blank">eotvos4</a> Issued by Hungary in 1991 <a href="../images/eotvos1.jpg" target="_blank">eotvos1</a> <a id="Escalante"></a>ESCALANTE, Jaime <a class="mlink" data-popup="../../Biographies/Escalante/popup/" href="../../Biographies/Escalante/">Ⓑ</a> <a href="../Store/escalante.html" target="_blank">Ⓣ</a> Issued by Bolivia in 2011 <a href="../images/escalante2.jpg" target="_blank">escalante2</a> Issued by USA in 2016 <a href="../images/escalante.jpg" target="_blank">escalante</a> <a id="Escher"></a>ESCHER, Maurits Cornelis Escher <a class="mlink" data-popup="../../Biographies/Escher/popup/" href="../../Biographies/Escher/">Ⓑ</a> <a href="../Store/escher.html" target="_blank">Ⓣ</a> Issued by Netherlands in 1935 (designed by Escher) <a href="../images/escher4.jpg" target="_blank">escher4</a> Issued by Netherlands in 1949 (Escher designed these stamps) <a href="../images/escher2.jpg" target="_blank">escher2</a> <a href="../images/escher3.jpg" target="_blank">escher3</a> Issued by Netherlands in 1998 <a href="../images/escher1.jpg" target="_blank">escher1</a> <a id="Euclid"></a>EUCLID <a class="mlink" data-popup="../../Biographies/Euclid/popup/" href="../../Biographies/Euclid/">Ⓑ</a> <a href="../Store/euclid.html" target="_blank">Ⓣ</a> Issued by Poland in 1971 <a href="../images/euclid2.jpg" target="_blank">euclid2</a> Issued by Vatican City in 1986, from Raphael's School of Athens <a href="../images/vatican1.jpg" target="_blank">vatican1</a> Issued by Maldives in 1988 <a href="../images/euclid1.jpg" target="_blank">euclid1</a> <a id="Euler"></a>EULER, Leonhard <a class="mlink" data-popup="../../Biographies/Euler/popup/" href="../../Biographies/Euler/">Ⓑ</a> <a href="../Store/euler.html" target="_blank">Ⓣ</a> Issued by German Democratic Republic in 1950, on the 250th anniversary of the Berlin Academy of Science <a href="../images/euler7.jpg" target="_blank">euler7</a> Issued by German Democratic Republic in 1957, part of a series 'Famous Scientists' <a href="../images/euler4.jpg" target="_blank">euler4</a> Issued by Soviet Union in 1957, to commemorate his 250th birthday <a href="../images/euler1.jpg" target="_blank">euler1</a> Issued by Switzerland in 1957, to commemorate his 250th birthday <a href="../images/euler2.jpg" target="_blank">euler2</a> Issued by Switzerland in 1979 (a banknote) <a href="../images/euler5.jpg" target="_blank">euler5</a> Issued by German Democratic Republic in 1983, on the 200th annniversary of his death <a href="../images/euler3.jpg" target="_blank">euler3</a> (See <a class="gllink" data-popup="../../Glossary/Grunbaum_note/" href="../../Glossary/#Grunbaum_note">THIS NOTE</a>) Issued by Russia in 2007 (an envelope) <a href="../images/euler12.jpg" target="_blank">euler12</a> Issued by Switzerland in 2007, on his 300th birthday <a href="../images/euler8.jpg" target="_blank">euler8</a> (a pre-release image which has slightly better quality than the stamp itelf) <a href="../images/euler9a.jpg" target="_blank">euler9a</a> <a href="../images/euler10.jpg" target="_blank">euler10</a> <a href="../images/euler11.jpg" target="_blank">euler11</a> (a first day cancel) Issued by Guinea-Bissau in 2009 <a href="../images/euler13.jpg" target="_blank">euler13</a> Issued by South Korea in 2014 <a href="../images/euler15.jpg" target="_blank">euler15</a> Issued by Russia in 2020 (a coin) <a href="../images/euler19.jpg" target="_blank">euler19</a> <a id="Euwe"></a>EUWE, Max <a class="mlink" data-popup="../../Biographies/Euwe/popup/" href="../../Biographies/Euwe/">Ⓑ</a> <a href="../Store/euwe.html" target="_blank">Ⓣ</a> Issued by Yugoslavia in 1995 <a href="../images/euwe1.jpg" target="_blank">euwe1</a> <a href="../images/euwe2.jpg" target="_blank">euwe2</a> Issued by Netherlands in 2002 <a href="../images/euwe3.jpg" target="_blank">euwe3</a> Issued by Central African Republic in 2021 <a href="../images/euwe10.jpg" target="_blank">euwe10</a> <a href="../images/euwe4.jpg" target="_blank">euwe4</a> Issued by Guinea in 2021 <a href="../images/euwe5.jpg" target="_blank">euwe5</a> <a href="../images/euwe6.jpg" target="_blank">euwe6</a> <a href="../images/euwe7.jpg" target="_blank">euwe7</a> <a href="../images/euwe8.jpg" target="_blank">euwe8</a> Issued by Mozambique in 2021 <a href="../images/euwe9.jpg" target="_blank">euwe9</a> <a id="Faraday"></a>FARADAY, Michael <a class="mlink" data-popup="../../Biographies/Faraday/popup/" href="../../Biographies/Faraday/">Ⓑ</a> <a href="../Store/faraday.html" target="_blank">Ⓣ</a> Issued by Madagascar in 1990 <a href="../images/faraday6.jpg" target="_blank">faraday6</a> Issued by Great Britain in 1991 <a href="../images/faraday1.jpg" target="_blank">faraday1</a> Issued by Great Britain in 1993 (a banknote) <a href="../images/faraday5.jpg" target="_blank">faraday5</a> Issued by Madagascar in 1993 <a href="../images/faraday9.jpg" target="_blank">faraday9</a> Issued by Cuba in 1994 <a href="../images/faraday2.jpg" target="_blank">faraday2</a> Issued by Palau in 2000 <a href="../images/faraday4.jpg" target="_blank">faraday4</a> Issued by Cambodia in 2001 <a href="../images/faraday3.jpg" target="_blank">faraday3</a> Issued by Guinea-Bissau in 2009 <a href="../images/faraday11.jpg" target="_blank">faraday11</a> Issued by Marshall Islands in 2012 <a href="../images/faraday7.jpg" target="_blank">faraday7</a> Issued by Macedonia in 2017 <a href="../images/faraday10.jpg" target="_blank">faraday10</a> Issued by Great Britain in 2021 <a href="../images/faraday8.jpg" target="_blank">faraday8</a> <a id="Feller"></a>FELLER,Vilem <a class="mlink" data-popup="../../Biographies/Feller/popup/" href="../../Biographies/Feller/">Ⓑ</a> <a href="../Store/feller.html" target="_blank">Ⓣ</a> Issued by Croatia in 2021 <a href="../images/feller1.jpg" target="_blank">feller1</a> <a id="Fermat"></a>FERMAT, Pierre de <a class="mlink" data-popup="../../Biographies/Fermat/popup/" href="../../Biographies/Fermat/">Ⓑ</a> <a href="../Store/fermat.html" target="_blank">Ⓣ</a> Issued by Czech Republic in 2000 <a href="../images/fermat2.jpg" target="_blank">fermat2</a> Issued by France in 2001, on the 400th anniversary of his birth <a href="../images/fermat1.jpg" target="_blank">fermat1</a> <a id="Fermi"></a>FERMI, Enrico <a class="mlink" data-popup="../../Biographies/Fermi/popup/" href="../../Biographies/Fermi/">Ⓑ</a> <a href="../Store/fermi.html" target="_blank">Ⓣ</a> Issued by Italy in 1967 celebrating the 25th anniversary of the first nuclear reaction. <a href="../images/fermi2.jpg" target="_blank">fermi2</a> Issued by Tanzania in 1996 <a href="../images/fermi8.jpg" target="_blank">fermi8</a> Issued by Romania in 2000 <a href="../images/fermi3.jpg" target="_blank">fermi3</a> Issued by Cambodia in 2001 <a href="../images/fermi5.jpg" target="_blank">fermi5</a> Issued by Guinea in 2001 <a href="../images/fermi4.jpg" target="_blank">fermi4</a> Issued by Italy in 2001 <a href="../images/fermi1.jpg" target="_blank">fermi1</a> Issued by Monaco in 2001 <a href="../images/fermi9.jpg" target="_blank">fermi9</a> Issued by USA in 2001 <a href="../images/fermi6.jpg" target="_blank">fermi6</a> <a id="Fessenden"></a>FESSENDEN, Reginald <a href="../Store/fessenden.html" target="_blank">Ⓣ</a> Issued by Canada in 1987 <a href="../images/fessenden1.jpg" target="_blank">fessenden1</a> Issued by Granada in 2013 <a href="../images/fessenden2.jpg" target="_blank">fessenden2</a> <a id="Feynman"></a>FEYNMAN, Richard <a class="mlink" data-popup="../../Biographies/Feynman/popup/" href="../../Biographies/Feynman/">Ⓑ</a> <a href="../Store/feynman.html" target="_blank">Ⓣ</a> Issued by USA in 2005 <a href="../images/feynman2.jpg" target="_blank">feynman2</a> Issued by Guinea-Bissau in 2009 <a href="../images/feynman1.jpg" target="_blank">feynman1</a> Issued by Sao Tome and Principe in 2009 <a href="../images/feynman4.jpg" target="_blank">feynman4</a> Issued by Czech Republic in 2016 <a href="../images/feynman3.jpg" target="_blank">feynman3</a> (Feynman diagram of double-beta decay) <a id="Fibonacci"></a>FIBONACCI <a class="mlink" data-popup="../../Biographies/Fibonacci/popup/" href="../../Biographies/Fibonacci/">Ⓑ</a> <a href="../Store/fibonacci.html" target="_blank">Ⓣ</a> Issued by Dominica in 1999 <a href="../images/fibonacci.jpg" target="_blank">fibonacci</a> Issued by Italy in 2020, on the 850th anniversary of his birth <a href="../images/fibonacci3.jpg" target="_blank">fibonacci3</a> <a id="Flamsteed"></a>FLAMSTEED, John <a class="mlink" data-popup="../../Biographies/Flamsteed/popup/" href="../../Biographies/Flamsteed/">Ⓑ</a> <a href="../Store/flamsteed.html" target="_blank">Ⓣ</a> Issued by Guinea in 2010 <a href="../images/flamsteed2.jpg" target="_blank">flamsteed2</a> <a id="Fields"></a>FIELDS, John Charles <a class="mlink" data-popup="../../Biographies/Fields/popup/" href="../../Biographies/Fields/">Ⓑ</a> <a href="../Store/fields.html" target="_blank">Ⓣ</a> Issued by Guinea in 2008, stamps showing Fields Medal winners: <a href="../images/fields1.jpg" target="_blank">fields1</a> <a href="../images/fields2.jpg" target="_blank">fields2</a> <a href="../images/baker.jpg" target="_blank">baker</a> <a href="../images/okounkov.jpg" target="_blank">okounkov</a> <a href="../images/weil.jpg" target="_blank">weil</a> <a href="../images/connes.jpg" target="_blank">connes</a> <a href="../images/donaldson.jpg" target="_blank">donaldson</a> <a href="../images/drinfeld.jpg" target="_blank">drinfeld</a> <a href="../images/schwartz.jpg" target="_blank">schwartz</a> <a href="../images/mumford.jpg" target="_blank">mumford</a> <a id="Foucault"></a>FOUCAULT, Léon <a class="mlink" data-popup="../../Biographies/Foucault/popup/" href="../../Biographies/Foucault/">Ⓑ</a> <a href="../Store/foucault.html" target="_blank">Ⓣ</a> Issued by France in 1958 <a href="../images/foucault1.jpg" target="_blank">foucault1</a> Issued by France in 1994 (showing a Foucault pendulum) <a href="../images/foucault2.jpg" target="_blank">foucault2</a> <a id="Fontenelle"></a>FONTENELLE, Bernard de <a class="mlink" data-popup="../../Biographies/Fontenelle/popup/" href="../../Biographies/Fontenelle/">Ⓑ</a> <a href="../Store/fontenelle.html" target="_blank">Ⓣ</a> Issued by France in 1966 <a href="../images/fontenelle1.jpg" target="_blank">fontenelle1</a> <a id="Francesca"></a>FRANCESCA, Piero della <a class="mlink" data-popup="../../Biographies/Francesca/popup/" href="../../Biographies/Francesca/">Ⓑ</a> <a href="../Store/francesca.html" target="_blank">Ⓣ</a> Issued by San Marino in 1992 <a href="../images/francesca1.jpg" target="_blank">francesca1</a> Issued by Guinea in 2012 <a href="../images/francesca2.jpg" target="_blank">francesca2</a> <a id="Franklin_Benjamin"></a>FRANKLIN, Benjamin <a class="mlink" data-popup="../../Biographies/Franklin_Benjamin/popup/" href="../../Biographies/Franklin_Benjamin/">Ⓑ</a> <a href="../Store/franklin_benjamin.html" target="_blank">Ⓣ</a> Issued by USA in 1847 (the first stamps issued by the USA) <a href="../images/franklin_benjamin9.jpg" target="_blank">franklin_benjamin9</a> <a href="../images/franklin_benjamin10.jpg" target="_blank">franklin_benjamin10</a> Issued by USA in 1855 <a href="../images/franklin_benjamin1.jpg" target="_blank">franklin_benjamin1</a> Issued by USA in 1890 <a href="../images/franklin_benjamin3.jpg" target="_blank">franklin_benjamin3</a> Issued by USA in 1902 <a href="../images/franklin_benjamin2.jpg" target="_blank">franklin_benjamin2</a> Issued by USA in 1914 (a banknote) <a href="../images/franklin_benjamin12.jpg" target="_blank">franklin_benjamin12</a> Issued by USA in 1934 (a banknote) <a href="../images/franklin_benjamin13.jpg" target="_blank">franklin_benjamin13</a> Issued by USA in 1955 <a href="../images/franklin_benjamin4.jpg" target="_blank">franklin_benjamin4</a> Issued by Bulgaria in 1956 <a href="../images/franklin_benjamin5.jpg" target="_blank">franklin_benjamin5</a> Issued by France in 1956 <a href="../images/franklin_benjamin6.jpg" target="_blank">franklin_benjamin6</a> Issued by USA in 1956 <a href="../images/franklin_benjamin8.jpg" target="_blank">franklin_benjamin8</a> Issued by Liberia in 1976 <a href="../images/franklin_benjamin7.jpg" target="_blank">franklin_benjamin7</a> Issued by USA in 2006 (a banknote) <a href="../images/franklin_benjamin14.jpg" target="_blank">franklin_benjamin14</a> Issued by USA in 2006 <a href="../images/franklin_benjamin15.jpg" target="_blank">franklin_benjamin15</a> <a href="../images/franklin_benjamin16.jpg" target="_blank">franklin_benjamin16</a> <a href="../images/franklin_benjamin17.jpg" target="_blank">franklin_benjamin17</a> Issued by USA in 2009 (a banknote) <a href="../images/franklin_benjamin11.jpg" target="_blank">franklin_benjamin11</a> <a id="Fraunhofer"></a>FRAUNHOFER, Joseph von <a href="../Store/fraunhoffer.html" target="_blank">Ⓣ</a> Issued by Germany in 2012 <a href="../images/fraunhofer1.jpg" target="_blank">fraunhofer1</a> <a id="Fresnel"></a>FRESNEL, Augustin <a class="mlink" data-popup="../../Biographies/Fresnel/popup/" href="../../Biographies/Fresnel/">Ⓑ</a> <a href="../Store/fresnel.html" target="_blank">Ⓣ</a> Issued by France in 2019 <a href="../images/fresnel.jpg" target="_blank">fresnel</a> <a id="Galileo"></a>GALILEI, Galileo <a class="mlink" data-popup="../../Biographies/Galileo/popup/" href="../../Biographies/Galileo/">Ⓑ</a> <a href="../Store/galileo.html" target="_blank">Ⓣ</a> Issued by Italy in 1933 <a href="../images/galileo12.jpg" target="_blank">galileo12</a> Issued by Italy in 1942 <a href="../images/galileo49.jpg" target="_blank">galileo49</a> <a href="../images/galileo5.jpg" target="_blank">galileo5</a> <a href="../images/galileo6.jpg" target="_blank">galileo6</a> Issued by Italy in 1945 <a href="../images/galileo13.jpg" target="_blank">galileo13</a> Issued by Czechoslovakia in 1964 <a href="../images/galileo24.jpg" target="_blank">galileo24</a> Issued by Hungary in 1964 <a href="../images/galileo20.jpg" target="_blank">galileo20</a> Issued by Italy in 1964 <a href="../images/galileo.jpg" target="_blank">galileo</a> <a href="../images/galileo4.jpg" target="_blank">galileo4</a> Issued by Romania in 1964 <a href="../images/galileo14.jpg" target="_blank">galileo14</a> Issued by Soviet Union in 1964 <a href="../images/galileo25.jpg" target="_blank">galileo25</a> Issued by Panama in 1965 <a href="../images/galileo31.jpg" target="_blank">galileo31</a> Issued by Paraguay in 1965 <a href="../images/galileo3.jpg" target="_blank">galileo3</a> Issued by Ecuador in 1966 <a href="../images/galileo9.jpg" target="_blank">galileo9</a> Issued by Yemen in 1969 <a href="../images/galileo19.jpg" target="_blank">galileo19</a> Issued by Niger in 1970 <a href="../images/galileo33.jpg" target="_blank">galileo33</a> Issued by Ajman in 1971 <a href="../images/galileo23.jpg" target="_blank">galileo23</a> Issued by Ascension in 1971 <a href="../images/galileo11.jpg" target="_blank">galileo11</a> Issued by Mexico in 1971 <a href="../images/galileo54.jpg" target="_blank">galileo54</a> Issued by Sharjah in 1972 <a href="../images/galileo52.jpg" target="_blank">galileo52</a> Issued by Italy in 1976 (a banknote) <a href="../images/galileo10.jpg" target="_blank">galileo10</a> Issued by Comoros in 1979 <a href="../images/galileo17.jpg" target="_blank">galileo17</a> Issued by San Marino in 1982 <a href="../images/galileo36.jpg" target="_blank">galileo36</a> Issued by Italy in 1983 <a href="../images/galileo7.jpg" target="_blank">galileo7</a> Issued by Djibouti in 1984 <a href="../images/galileo34.jpg" target="_blank">galileo34</a> Issued by Central African Republic in 1985 <a href="../images/galileo16.jpg" target="_blank">galileo16</a> Issued by Comoros in 1988 <a href="../images/galileo18.jpg" target="_blank">galileo18</a> Issued by Grenada in 1991 <a href="../images/galileo57.jpg" target="_blank">galileo57</a> Issued by Grenada in 1999 <a href="../images/galileo42.jpg" target="_blank">galileo42</a> Issued by Guinea in 2000 <a href="../images/galileo45.jpg" target="_blank">galileo45</a> Issued by Ireland in 2000 <a href="../images/galileo8.jpg" target="_blank">galileo8</a> Issued by Guinea-Bissau in 2006 <a href="../images/galileo44.jpg" target="_blank">galileo44</a> Issued by Argentina in 2009 <a href="../images/galileo58.jpg" target="_blank">galileo58</a> Issued by Gibraltar in 2009 <a href="../images/galileo61.jpg" target="_blank">galileo61</a> Issued by Guinea-Bissau in 2009 <a href="../images/galileo55.jpg" target="_blank">galileo55</a> Issued by Indonesia in 2009 <a href="../images/galileo51.jpg" target="_blank">galileo51</a> Issued by Lithuania in 2009 <a href="../images/galileo62.jpg" target="_blank">galileo62</a> Issued by Luxembourg in 2009 <a href="../images/galileo60.jpg" target="_blank">galileo60</a> Issued by Netherland Antilles in 2009 <a href="../images/galileo41.jpg" target="_blank">galileo41</a> Issued by Ukraine in 2009 <a href="../images/galileo35.jpg" target="_blank">galileo35</a> Issued by Uruguay in 2009 <a href="../images/galileo37.jpg" target="_blank">galileo37</a> Issued by Marshall Islands in 2010 <a href="../images/galileo43.jpg" target="_blank">galileo43</a> Issued by Grenada in 2011 <a href="../images/galileo46.jpg" target="_blank">galileo46</a> Issued by Bolivia in 2014 <a href="../images/galileo50.jpg" target="_blank">galileo50</a> Issued by Bosnia and Herzegovia in 2014 <a href="../images/galileo39.jpg" target="_blank">galileo39</a> Issued by Cyprus in 2014 <a href="../images/galileo21.jpg" target="_blank">galileo21</a> Issued by Guinea in 2014 <a href="../images/galileo47.jpg" target="_blank">galileo47</a> <a href="../images/galileo59.jpg" target="_blank">galileo59</a> Issued by Macedonia in 2014 <a href="../images/galileo30.jpg" target="_blank">galileo30</a> Issued by Maldives in 2014 <a href="../images/galileo26.jpg" target="_blank">galileo26</a> <a href="../images/galileo27.jpg" target="_blank">galileo27</a> <a href="../images/galileo28.jpg" target="_blank">galileo28</a> <a href="../images/galileo29.jpg" target="_blank">galileo29</a> Issued by Mongola in 2014 <a href="../images/galileo38.jpg" target="_blank">galileo38</a> Issued by Montserrat in 2014 <a href="../images/galileo32.jpg" target="_blank">galileo32</a> Issued by Nicaragua in 2014 <a href="../images/galileo40.jpg" target="_blank">galileo40</a> Issued by San Marino in 2014 <a href="../images/galileo48.jpg" target="_blank">galileo48</a> <a id="Galois"></a>GALOIS, Evariste <a class="mlink" data-popup="../../Biographies/Galois/popup/" href="../../Biographies/Galois/">Ⓑ</a> <a href="../Store/galois.html" target="_blank">Ⓣ</a> Issued by France in 1984 <a href="../images/galois.jpg" target="_blank">galois</a> <a id="Garavito"></a>GARAVITO, Julio <a class="mlink" data-popup="../../Biographies/Garavito/popup/" href="../../Biographies/Garavito/">Ⓑ</a> <a href="../Store/garavito.html" target="_blank">Ⓣ</a> Issued by Colombia in 1949 <a href="../images/garavito2.jpg" target="_blank">garavito2</a> Issued by Colombia in 1996 <a href="../images/garavito1.jpg" target="_blank">garavito1</a> (a banknote) <a href="../images/garavito1a.jpg" target="_blank">garavito1a</a> (the reverse showing the lunar crater named after him) Issued by Colombia in 2020 <a href="../images/garavito3.jpg" target="_blank">garavito3</a> <a href="../images/garavito4.jpg" target="_blank">garavito4</a> (First day cover) <a id="Gauss"></a>GAUSS, Carl Friedrich <a class="mlink" data-popup="../../Biographies/Gauss/popup/" href="../../Biographies/Gauss/">Ⓑ</a> <a href="../Store/gauss.html" target="_blank">Ⓣ</a> Issued by Germany in 1955, to commemorate the centenary of his death <a href="../images/gauss1.jpg" target="_blank">gauss1</a> Issued by German Democratic Republic in 1977 <a href="../images/gauss3.jpg" target="_blank">gauss3</a> (constuctibity of the 17-gon) Issued by Germany in 1977, to commemorate his 200th birthday <a href="../images/gauss2.jpg" target="_blank">gauss2</a> (the Gaussian integers) Issued by Germany in 1977 (a coin) <a href="../images/gauss13.jpg" target="_blank">gauss13</a> Issued by Germany in 1991(a banknote) <a href="../images/gauss4.jpg" target="_blank">gauss4</a> <a href="../images/gauss12.jpg" target="_blank">gauss12</a> (The reverse, showing Gauss's triangulation work) Issued by Nicaragua in 1994 as part of a series depicting astronomers <a href="../images/gauss7.jpg" target="_blank">gauss7</a> Issued by Guinea in 2010 <a href="../images/gauss8.jpg" target="_blank">gauss8</a> Issued by Marshall Islands in 2012 <a href="../images/gauss10.jpg" target="_blank">gauss10</a> <a id="Gay-Lussac"></a>GAY-LUSSAC, Joseph <a href="../Store/gay-lussac.html" target="_blank">Ⓣ</a> Issued by France in 1951 <a href="../images/gaylussac1.jpg" target="_blank">gaylussac1</a> <a id="Gerbert"></a>GERBERT of Aurillac <a class="mlink" data-popup="../../Biographies/Gerbert/popup/" href="../../Biographies/Gerbert/">Ⓑ</a> <a href="../Store/gerbert.html" target="_blank">Ⓣ</a> Issued by France in 1964 <a href="../images/gerbert1.jpg" target="_blank">gerbert1</a> <a id="Germain"></a>GERMAIN, Sophie <a class="mlink" data-popup="../../Biographies/Germain/popup/" href="../../Biographies/Germain/">Ⓑ</a> <a href="../Store/germain.html" target="_blank">Ⓣ</a> Issued by France in 2016 <a href="../images/germain.jpg" target="_blank">germain</a> <a id="Gerstner"></a>GERSTNER, František <a class="mlink" data-popup="../../Biographies/Gerstner/popup/" href="../../Biographies/Gerstner/">Ⓑ</a> <a href="../Store/gerstner.html" target="_blank">Ⓣ</a> Issued by Czechoslovakia in 1957, one of a set published for the 250th anniversary of the Prague Engineering School <a href="../images/gerstner1.jpg" target="_blank">gerstner1</a> Issued by Czech Republic in 2006 <a href="../images/gerstner2.jpg" target="_blank">gerstner2</a> <a id="Ghetaldi"></a>GHETALDI, Marino <a class="mlink" data-popup="../../Biographies/Ghetaldi/popup/" href="../../Biographies/Ghetaldi/">Ⓑ</a> <a href="../Store/ghetaldi.html" target="_blank">Ⓣ</a> Issued by Croatia in 2018 <a href="../images/ghetaldi.jpg" target="_blank">ghetaldi</a> <a id="Gibbs"></a>GIBBS, Josiah Willard <a class="mlink" data-popup="../../Biographies/Gibbs/popup/" href="../../Biographies/Gibbs/">Ⓑ</a> <a href="../Store/gibbs.html" target="_blank">Ⓣ</a> Issued by USA in 2005 <a href="../images/gibbs1.jpg" target="_blank">gibbs1</a> <a id="Godel"></a>GÖDEL, Kurt <a class="mlink" data-popup="../../Biographies/Godel/popup/" href="../../Biographies/Godel/">Ⓑ</a> <a href="../Store/godel.html" target="_blank">Ⓣ</a> Issued by Portugal in 2000 <a href="../images/kolmogorov_godel_poincare.jpg" target="_blank">kolmogorov_godel_poincare</a> <a id="Grimaldi"></a>GRIMALDI, Francesco <a class="mlink" data-popup="../../Biographies/Grimaldi/popup/" href="../../Biographies/Grimaldi/">Ⓑ</a> <a href="../Store/grimaldi.html" target="_blank">Ⓣ</a> Issued by Monaco in 2009 <a href="../images/grimaldi1.jpg" target="_blank">grimaldi1</a> <a id="Guericke"></a>GUERICKE, Otto von <a href="../Store/guericke.html" target="_blank">Ⓣ</a> Issued by Germany in 1936 <a href="../images/guericke4.jpg" target="_blank">guericke4</a> Issued by German Democratic Republic in 1977 <a href="../images/guericke2.jpg" target="_blank">guericke2</a> Issued by Germany in 2002 <a href="../images/guericke1.jpg" target="_blank">guericke1</a> <a id="Guo_Shoujing"></a>GUO SHOUJING <a class="mlink" data-popup="../../Biographies/Guo_Shoujing/popup/" href="../../Biographies/Guo_Shoujing/">Ⓑ</a> <a href="../Store/guo_shoujing.html" target="_blank">Ⓣ</a> Issued by China in 1962 <a href="../images/guo2.jpg" target="_blank">guo2</a> <a href="../images/guo3.jpg" target="_blank">guo3</a> Issued by Denmark in 2012 <a href="../images/guo4.jpg" target="_blank">guo4</a> Issued by Hong Kong China in 2015 <a href="../images/guo.jpg" target="_blank">guo</a> <a id="Hadamard"></a>HADAMARD, Jacques <a class="mlink" data-popup="../../Biographies/Hadamard/popup/" href="../../Biographies/Hadamard/">Ⓑ</a> <a href="../Store/hadamard.html" target="_blank">Ⓣ</a> Issued by Guinea in 2008 <a href="../images/hadamard.jpg" target="_blank">hadamard</a> <a id="Hallerstein"></a>HALLERSTEIN, Ferdinand <a class="mlink" data-popup="../../Biographies/Hallerstein/popup/" href="../../Biographies/Hallerstein/">Ⓑ</a> <a href="../Store/hallerstein.html" target="_blank">Ⓣ</a> Issued by Slovenia in 2003 <a href="../images/hallerstein1.jpg" target="_blank">hallerstein1</a> <a id="Halley"></a>HALLEY, Edmund <a class="mlink" data-popup="../../Biographies/Halley/popup/" href="../../Biographies/Halley/">Ⓑ</a> <a href="../Store/halley.html" target="_blank">Ⓣ</a> Issued by St Helena in 1977 <a href="../images/halley1.jpg" target="_blank">halley1</a> <a href="../images/halley2.jpg" target="_blank">halley2</a> <a href="../images/halley3.jpg" target="_blank">halley3</a> <a href="../images/halley4.jpg" target="_blank">halley4</a> <a href="../images/halley5.jpg" target="_blank">halley5</a> <a href="../images/halley6.jpg" target="_blank">halley6</a> Issued by Antigua and Barbuda in 1985 <a href="../images/halley7.jpg" target="_blank">halley7</a> <a href="../images/halley8.jpg" target="_blank">halley8</a> <a href="../images/halley9.jpg" target="_blank">halley9</a> Issued by British Antarctic Territory in 1985 <a href="../images/halley48.jpg" target="_blank">halley48</a> <a href="../images/halley49.jpg" target="_blank">halley49</a> Issued by Central African Republic in 1985 (with Newton) <a href="../images/halley24.jpg" target="_blank">halley24</a> Issued by Dominica in 1985 <a href="../images/halley10.jpg" target="_blank">halley10</a> Issued by Grenada in 1985 <a href="../images/halley11.jpg" target="_blank">halley11</a> Issued by Guinea in 1985 <a href="../images/halley12.jpg" target="_blank">halley12</a> <a href="../images/halley13.jpg" target="_blank">halley13</a> <a href="../images/halley14.jpg" target="_blank">halley14</a> <a href="../images/halley15.jpg" target="_blank">halley15</a> Issued by Lesotho in 1985 <a href="../images/halley16.jpg" target="_blank">halley16</a> <a href="../images/halley17.jpg" target="_blank">halley17</a> Issued by Montserrat in 1985 <a href="../images/halley50.jpg" target="_blank">halley50</a> <a href="../images/halley51.jpg" target="_blank">halley51</a> <a href="../images/halley52.jpg" target="_blank">halley52</a> <a href="../images/halley53.jpg" target="_blank">halley53</a> Issued by Nicaragua in 1985 <a href="../images/halley18.jpg" target="_blank">halley18</a> <a href="../images/halley19.jpg" target="_blank">halley19</a> <a href="../images/halley20.jpg" target="_blank">halley20</a> <a href="../images/halley21.jpg" target="_blank">halley21</a> Issued by Uganda in 1985 <a href="../images/halley22.jpg" target="_blank">halley22</a> <a href="../images/halley23.jpg" target="_blank">halley23</a> Issued by Vietnam in 1985 <a href="../images/halley54.jpg" target="_blank">halley54</a> Issued by Bhutan in 1986 <a href="../images/halley56.jpg" target="_blank">halley56</a> <a href="../images/halley57.jpg" target="_blank">halley57</a> <a href="../images/halley58.jpg" target="_blank">halley58</a> <a href="../images/halley59.jpg" target="_blank">halley59</a> <a href="../images/halley60.jpg" target="_blank">halley60</a> <a href="../images/halley61.jpg" target="_blank">halley61</a> <a href="../images/halley62.jpg" target="_blank">halley62</a> <a href="../images/halley63.jpg" target="_blank">halley63</a> Issued by Guinea in 1986 <a href="../images/halley25.jpg" target="_blank">halley25</a> <a href="../images/halley29.jpg" target="_blank">halley29</a> Issued by Laos in 1986 <a href="../images/halley26.jpg" target="_blank">halley26</a> Issued by Mauritius in 1986 <a href="../images/halley27.jpg" target="_blank">halley27</a> Issued by Romania in 1986 <a href="../images/halley31.jpg" target="_blank">halley31</a> Issued by Seychelles in 1986 <a href="../images/halley32.jpg" target="_blank">halley32</a> Issued by Sri Lanka in 1986 <a href="../images/halley33.jpg" target="_blank">halley33</a> Issued by St Helena in 1986 <a href="../images/halley28.jpg" target="_blank">halley28</a> Issued by St Vincent in 1986 <a href="../images/halley34.jpg" target="_blank">halley34</a> Issued by Togo in 1986 (with Newton) <a href="../images/halley30.jpg" target="_blank">halley30</a> Issued by Vanuatu in 1986 <a href="../images/halley35.jpg" target="_blank">halley35</a> Issued by Comoros in 1988 <a href="../images/halley55.jpg" target="_blank">halley55</a> Issued by Mexico in 1988 <a href="../images/halley36.jpg" target="_blank">halley36</a> Issued by Nicaragua in 1994 <a href="../images/halley37.jpg" target="_blank">halley37</a> Issued by Nevis in 2000 <a href="../images/halley38.jpg" target="_blank">halley38</a> Issued by Monaco in 2005 <a href="../images/halley39.jpg" target="_blank">halley39</a> Issued by Ascension in 2006 <a href="../images/halley42.jpg" target="_blank">halley42</a> Issued by Nauru in 2006 <a href="../images/halley43.jpg" target="_blank">halley43</a> Issued by Solomon Islands in 2006 <a href="../images/halley41.jpg" target="_blank">halley41</a> Issued by Sao Tome and Principe in 2008 <a href="../images/halley44.jpg" target="_blank">halley44</a> Issued by Guinea in 2010 <a href="../images/halley45.jpg" target="_blank">halley45</a> <a href="../images/halley46.jpg" target="_blank">halley46</a> <a href="../images/halley47.jpg" target="_blank">halley47</a> <a id="Hamilton"></a>HAMILTON, William Rowan <a class="mlink" data-popup="../../Biographies/Hamilton/popup/" href="../../Biographies/Hamilton/">Ⓑ</a> <a href="../Store/hamilton.html" target="_blank">Ⓣ</a> Issued by Ireland in 1943, to commemorate the centenary of the discovery of quaternions <a href="../images/hamilt1.jpg" target="_blank">hamilt1</a> <a href="../images/hamilt2.jpg" target="_blank">hamilt2</a> Issued by Ireland in 1983 <a href="../images/quaternions.jpg" target="_blank">quaternions</a> (the multiplication of quaternions) Issued by Ireland in 2005, to commemorate the World Year of Physics and his 200th birthday <a href="../images/hamilton3.jpg" target="_blank">hamilton3</a> <a id="Haret"></a>HARET, Spiru <a class="mlink" data-popup="../../Biographies/Haret/popup/" href="../../Biographies/Haret/">Ⓑ</a> <a href="../Store/haret.html" target="_blank">Ⓣ</a> Issued by Romania in 1976, on the 125th anniversary of his birth <a href="../images/haret.jpg" target="_blank">haret</a> Issued by Romania in 2018 <a href="../images/haret2.jpg" target="_blank">haret2</a> <a id="Harriot"></a>HARRIOT, Thomas <a class="mlink" data-popup="../../Biographies/Harriot/popup/" href="../../Biographies/Harriot/">Ⓑ</a> <a href="../Store/harriot.html" target="_blank">Ⓣ</a> Issued by Guinea in 2009 <a href="../images/harriot.jpg" target="_blank">harriot</a> Issued by Guinea-Bissau in 2009 <a href="../images/harriot2.jpg" target="_blank">harriot2</a> <a id="Harrison"></a>HARRISON, John <a href="../Store/harrison.html" target="_blank">Ⓣ</a> Issued by Ascension in 1971 <a href="../images/harrison6.jpg" target="_blank">harrison6</a> (See <a class="gllink" data-popup="../../Glossary/Harrison_note/" href="../../Glossary/#Harrison_note">THIS NOTE</a>) Issued by Ascension in 1979 <a href="../images/harrison4.jpg" target="_blank">harrison4</a> Issued by Great Britain in 1990 <a href="../images/harrison1.jpg" target="_blank">harrison1</a> <a href="../images/harrison2.jpg" target="_blank">harrison2</a> Issued by Great Britain in 1993 <a href="../images/harrison5.jpg" target="_blank">harrison5</a> <a id="Hawking"></a>HAWKING, Stephen <a class="mlink" data-popup="../../Biographies/Hawking/popup/" href="../../Biographies/Hawking/">Ⓑ</a> <a href="../Store/hawking.html" target="_blank">Ⓣ</a> Issued by Zambia in 1974 <a href="../images/hawking3.jpg" target="_blank">hawking3</a> Issued by Palau in 2000 <a href="../images/hawking1.jpg" target="_blank">hawking1</a> Issued by Isle of Man in 2016 <a href="../images/hawking4.jpg" target="_blank">hawking4</a> Issued by Chad in 2017 <a href="../images/hawking8.jpg" target="_blank">hawking8</a> Issued by Sierra Leone in 2017 <a href="../images/hawking7.jpg" target="_blank">hawking7</a> Issued by Djibouti in 2022 <a href="../images/hawking9.jpg" target="_blank">hawking9</a> <a href="../images/hawking12.jpg" target="_blank">hawking12</a> <a href="../images/hawking13.jpg" target="_blank">hawking13</a> Issued by Guinea in 2022 <a href="../images/hawking6.jpg" target="_blank">hawking6</a> <a href="../images/hawking10.jpg" target="_blank">hawking10</a> <a href="../images/hawking11.jpg" target="_blank">hawking11</a> <a href="../images/hawking14.jpg" target="_blank">hawking14</a> <a id="Heisenberg"></a>HEISENBERG, Werner <a class="mlink" data-popup="../../Biographies/Heisenberg/popup/" href="../../Biographies/Heisenberg/">Ⓑ</a> <a href="../Store/heisenberg.html" target="_blank">Ⓣ</a> Issued by Uruguay in 1977 <a href="../images/heisenberg3.jpg" target="_blank">heisenberg3</a> Issued by Sweden in 1982 <a href="../images/heisenberg6.jpg" target="_blank">heisenberg6</a> Issued by Nevis in 1995 <a href="../images/heisenberg5.jpg" target="_blank">heisenberg5</a> Issued by Nicaragua in 1996 <a href="../images/heisenberg8.jpg" target="_blank">heisenberg8</a> Issued by Micronesia in 2000 <a href="../images/heisenberg4.jpg" target="_blank">heisenberg4</a> Issued by Germany in 2001 <a href="../images/heisenberg1.jpg" target="_blank">heisenberg1</a> Issued by Guinea-Bissau in 2009 <a href="../images/heisenberg2.jpg" target="_blank">heisenberg2</a> Issued by Guinea in 2012 <a href="../images/heisenberg9.jpg" target="_blank">heisenberg9</a> <a id="Helmholtz"></a>HELMHOLTZ, Hermann von <a class="mlink" data-popup="../../Biographies/Helmholtz/popup/" href="../../Biographies/Helmholtz/">Ⓑ</a> <a href="../Store/helmholtz.html" target="_blank">Ⓣ</a> Issued by German Democratic Republic in 1950 <a href="../images/helmholtz3.jpg" target="_blank">helmholtz3</a> Issued by West Berlin in 1971, on the 150th birth anniversary <a href="../images/helmholtz2.jpg" target="_blank">helmholtz2</a> Issued by Germany in 1994 <a href="../images/helmholt.jpg" target="_blank">helmholt</a> <a id="Heron"></a>HERON of Alexandria <a class="mlink" data-popup="../../Biographies/Heron/popup/" href="../../Biographies/Heron/">Ⓑ</a> <a href="../Store/heron.html" target="_blank">Ⓣ</a> Issued by Greece in 2006 <a href="../images/heron1.jpg" target="_blank">heron1</a> (automatic temple gates) <a href="../images/heron2.jpg" target="_blank">heron2</a> (a hodometer) <a id="Herschel_Caroline"></a>HERSCHEL, Caroline <a class="mlink" data-popup="../../Biographies/Herschel_Caroline/popup/" href="../../Biographies/Herschel_Caroline/">Ⓑ</a> <a href="../Store/herschel_caroline.html" target="_blank">Ⓣ</a> Issued by Redonda in 1985 <a href="../images/herschel_c2.jpg" target="_blank">herschel_c2</a> Issued by Guyana in 1991 <a href="../images/herschel_c1.jpg" target="_blank">herschel_c1</a> <a id="Herschel"></a>HERSCHEL, John <a class="mlink" data-popup="../../Biographies/Herschel/popup/" href="../../Biographies/Herschel/">Ⓑ</a> <a href="../Store/herschel.html" target="_blank">Ⓣ</a> Issued by Great Britain in 1970 (W Herschel, Baily, J Herschel) <a href="../images/herschel7.jpg" target="_blank">herschel7</a> <a id="Herschel_William"></a>HERSCHEL, William <a class="mlink" data-popup="../../Biographies/Herschel_William/popup/" href="../../Biographies/Herschel_William/">Ⓑ</a> <a href="../Store/herschel_william.html" target="_blank">Ⓣ</a> Issued by Comoros in 1979 <a href="../images/herschel_william1.jpg" target="_blank">herschel_william1</a> Issued by Gabon in 1981 <a href="../images/herschel_william6.jpg" target="_blank">herschel_william6</a> Issued by Mali in 1981 <a href="../images/herschel_william7.jpg" target="_blank">herschel_william7</a> Issued by Paraguay in 1984 <a href="../images/herschel_william14.jpg" target="_blank">herschel_william14</a> Issued by Nicaragua in 1985 (telescope) <a href="../images/herschel_william14.jpg" target="_blank">herschel_william14</a> Issued by Ivory Coast in 1986 <a href="../images/herschel_william12.jpg" target="_blank">herschel_william12</a> Issued by Central African Republic in 1987 <a href="../images/herschel_william16.jpg" target="_blank">herschel_william16</a> Issued by Grenada in 1991 <a href="../images/herschel_william3.jpg" target="_blank">herschel_william3</a> Issued by Sierra Leone in 1991 <a href="../images/herschel_william9.jpg" target="_blank">herschel_william9</a> Issued by Nicaragua in 1994 <a href="../images/herschel_william5.jpg" target="_blank">herschel_william5</a> Issued by Guinea in 1998 <a href="../images/herschel_william8.jpg" target="_blank">herschel_william8</a> Issued by Guinea in 2000 (telescope) <a href="../images/herschel_william15.jpg" target="_blank">herschel_william15</a> Issued by Nevis in 2000 <a href="../images/herschel_william2.jpg" target="_blank">herschel_william2</a> Issued by Guinea in 2008 <a href="../images/herschel_william13.jpg" target="_blank">herschel_william13</a> <a id="Hertz_Gustav"></a>HERTZ, Gustav <a class="mlink" data-popup="../../Biographies/Hertz_Gustav/popup/" href="../../Biographies/Hertz_Gustav/">Ⓑ</a> <a href="../Store/hertz_gustav.html" target="_blank">Ⓣ</a> Issued by German Democratic Republic in 1977 <a href="../images/hertz_gustav3.jpg" target="_blank">hertz_gustav3</a> Issued by German Democratic Republic in 1987 <a href="../images/hertz_gustav2.jpg" target="_blank">hertz_gustav2</a> Issued by Grenada in 1995 <a href="../images/hertz_gustav5.jpg" target="_blank">hertz_gustav5</a> Issued by St Vincent in 1995 <a href="../images/hertz_gustav4.jpg" target="_blank">hertz_gustav4</a> <a id="Hertz_Heinrich"></a>HERTZ, Heinrich <a class="mlink" data-popup="../../Biographies/Hertz_Heinrich/popup/" href="../../Biographies/Hertz_Heinrich/">Ⓑ</a> <a href="../Store/hertz_heinrich.html" target="_blank">Ⓣ</a> Issued by German Democratic Republic in 1957 <a href="../images/hertz_heinrich5.jpg" target="_blank">hertz_heinrich5</a> Issued by Germany in 1957 <a href="../images/hertz_heinrich1.jpg" target="_blank">hertz_heinrich1</a> Issued by Czechoslovakia in 1959 <a href="../images/hertz_heinrich7.jpg" target="_blank">hertz_heinrich7</a> Issued by Mexico in 1967 <a href="../images/hertz_heinrich4.jpg" target="_blank">hertz_heinrich4</a> Issued by Guinea in 1983 <a href="../images/hertz_heinrich3.jpg" target="_blank">hertz_heinrich3</a> Issued by San Marino in 1992 <a href="../images/hertz_heinrich2.jpg" target="_blank">hertz_heinrich2</a> Issued by Germany in 1994 <a href="../images/hertz_heinrich6.jpg" target="_blank">hertz_heinrich6</a> Issued by Germany in 2013 <a href="../images/hertz_heinrich8.jpg" target="_blank">hertz_heinrich8</a> Issued by Grenada in 2013 <a href="../images/hertz_heinrich12.jpg" target="_blank">hertz_heinrich12</a> <a id="Hevelius_Johannes"></a>HEVELIUS, Johannes <a class="mlink" data-popup="../../Biographies/Hevelius_Johannes/popup/" href="../../Biographies/Hevelius_Johannes/">Ⓑ</a> <a href="../Store/hevelius_johannes.html" target="_blank">Ⓣ</a> Issued by Danzig in 1923 (a banknote) <a href="../images/hevelius5.jpg" target="_blank">hevelius5</a> Issued by Anguilla in 1986 <a href="../images/hevelius4.jpg" target="_blank">hevelius4</a> Issued by Poland in 1987 <a href="../images/hevelius1.jpg" target="_blank">hevelius1</a> <a href="../images/hevelius2.jpg" target="_blank">hevelius2</a> Issued by Poland in 2011 <a href="../images/hevelius3.jpg" target="_blank">hevelius3</a> <a id="Hilbert"></a>HILBERT, David <a class="mlink" data-popup="../../Biographies/Hilbert/popup/" href="../../Biographies/Hilbert/">Ⓑ</a> <a href="../Store/hilbert.html" target="_blank">Ⓣ</a> Issued by Democratic Republic of the Congo in 2001 <a href="../images/hilbert1.jpg" target="_blank">hilbert1</a> Issued by Macau China in 2005 <a href="../images/fractal6.jpg" target="_blank">fractal6</a> <a id="Hipparchus"></a>HIPPARCHUS OF RHODES <a class="mlink" data-popup="../../Biographies/Hipparchus/popup/" href="../../Biographies/Hipparchus/">Ⓑ</a> <a href="../Store/hipparchus.html" target="_blank">Ⓣ</a> Issued by Greece in 1965 <a href="../images/hipparchus1.jpg" target="_blank">hipparchus1</a> <a id="Hollerith"></a>HOLLERITH, Herman <a class="mlink" data-popup="../../Biographies/Hollerith/popup/" href="../../Biographies/Hollerith/">Ⓑ</a> <a href="../Store/hollerith.html" target="_blank">Ⓣ</a> Issued by Romania in 2004, a postcard <a href="../images/hollerith1.jpg" target="_blank">hollerith1</a> <a href="../images/hollerith2.jpg" target="_blank">hollerith2</a> <a id="Hooke"></a>HOOKE, Robert <a class="mlink" data-popup="../../Biographies/Hooke/popup/" href="../../Biographies/Hooke/">Ⓑ</a> <a href="../Store/hooke.html" target="_blank">Ⓣ</a> Issued by Grenada in 2000 <a href="../images/hooke1.jpg" target="_blank">hooke1</a> <a id="Hronec"></a>HRONEC, Jur <a class="mlink" data-popup="../../Biographies/Hronec/popup/" href="../../Biographies/Hronec/">Ⓑ</a> <a href="../Store/hronec.html" target="_blank">Ⓣ</a> Issued by Czechoslovakia in 1963, for the centenary of the Czech Mathematics and Physics Union. <a href="../images/hronec2.jpg" target="_blank">hronec2</a> Issued by Czechoslovakia in 1981, part of an eight-stamp series 'Famous Persons' <a href="../images/hronec.jpg" target="_blank">hronec</a> Issued by Slovakia in 2000 <a href="../images/hronec_schwarz_stefan.jpg" target="_blank">hronec_schwarz_stefan</a> <a id="Hua"></a>HUA Loo-Keng <a class="mlink" data-popup="../../Biographies/Hua/popup/" href="../../Biographies/Hua/">Ⓑ</a> <a href="../Store/hua.html" target="_blank">Ⓣ</a> Issued by China in 1988 <a href="../images/hua.jpg" target="_blank">hua</a> <a id="Hubble"></a>HUBBLE, Edwin <a class="mlink" data-popup="../../Biographies/Hubble/popup/" href="../../Biographies/Hubble/">Ⓑ</a> <a href="../Store/hubble.html" target="_blank">Ⓣ</a> Issued by Nicaragua in 1994 <a href="../images/hubble2.jpg" target="_blank">hubble2</a> Issued by Palau in 1998 <a href="../images/hubble5.jpg" target="_blank">hubble5</a> Issued by St Vincent in 2000 <a href="../images/hubble1.jpg" target="_blank">hubble1</a> Issued by Guinea in 2008 <a href="../images/hubble12.jpg" target="_blank">hubble12</a> Issued by USA in 2008 <a href="../images/hubble4.jpg" target="_blank">hubble4</a> Issued by Guinea in 2010 <a href="../images/hubble9.jpg" target="_blank">hubble9</a> <a href="../images/hubble10.jpg" target="_blank">hubble10</a> Issued by Guinea in 2015 <a href="../images/hubble6.jpg" target="_blank">hubble6</a> Issued by Guinea in 2020 <a href="../images/hubble7.jpg" target="_blank">hubble7</a> Issued by Djibouti in 2023 <a href="../images/hubble8.jpg" target="_blank">hubble8</a> <a href="../images/hubble11.jpg" target="_blank">hubble11</a> <a id="Huygens"></a>HUYGENS, Christiaan <a class="mlink" data-popup="../../Biographies/Huygens/popup/" href="../../Biographies/Huygens/">Ⓑ</a> <a href="../Store/huygens.html" target="_blank">Ⓣ</a> Issued by Netherlands in 1928 <a href="../images/huygens1.jpg" target="_blank">huygens1</a> Issued by Netherlands in 1955 (a banknote) <a href="../images/huygens13.jpg" target="_blank">huygens13</a> Issued by Netherlands in 1962, showing Huygen's pendulum clock <a href="../images/clock.jpg" target="_blank">clock</a> Issued by Comoros in 1975 <a href="../images/huygens3.jpg" target="_blank">huygens3</a> Issued by Netherlands in 1987 <a href="../images/huygens14.jpg" target="_blank">huygens14</a> Issued by Netherlands in 1988 <a href="../images/huygens15.jpg" target="_blank">huygens15</a> Issued by Grenada in 2000 <a href="../images/huygens2.jpg" target="_blank">huygens2</a> Issued by Guinea in 2007 <a href="../images/huygens9.jpg" target="_blank">huygens9</a> <a href="../images/huygens10.jpg" target="_blank">huygens10</a> Issued by Sao Tome and Principe in 2008 <a href="../images/huygens7.jpg" target="_blank">huygens7</a> Issued by Guinea-Bissau in 2009 <a href="../images/huygens8.jpg" target="_blank">huygens8</a> Issued by Netherlands in 2015 <a href="../images/huygens18.jpg" target="_blank">huygens18</a> <a id="Ionescu"></a>IONESCU-BIZET, Ion <a class="mlink" data-popup="../../Biographies/Ionescu/popup/" href="../../Biographies/Ionescu/">Ⓑ</a> <a href="../Store/ionescu.html" target="_blank">Ⓣ</a> Issued by Romania in 1995 <a href="../images/ionescu.jpg" target="_blank">ionescu</a> <a id="Janiszewski"></a>JANISZEWSKI, Zygmunt <a class="mlink" data-popup="../../Biographies/Janiszewski/popup/" href="../../Biographies/Janiszewski/">Ⓑ</a> <a href="../Store/janiszewski.html" target="_blank">Ⓣ</a> Issued by Poland in 1982, part of a series to celebrate the International Congress in Warsaw <a href="../images/janisz.jpg" target="_blank">janisz</a> <a id="Juan"></a>JUAN, Jorge <a class="mlink" data-popup="../../Biographies/Santacilia/popup/" href="../../Biographies/Santacilia/">Ⓑ</a> <a href="../Store/juan.html" target="_blank">Ⓣ</a> Issued by Ecuador in 1936 (with La Condamine and Ulloa) <a href="../images/condamine1.jpg" target="_blank">condamine1</a> <a href="../images/condamine2.jpg" target="_blank">condamine2</a> Issued by Spain in 1974 <a href="../images/juan1.jpg" target="_blank">juan1</a> Issued by Sovereign Military Order of Malta in 2023 <a href="../images/juan2.jpg" target="_blank">juan2</a> <a id="Jungius"></a>JUNGIUS, Joachim <a class="mlink" data-popup="../../Biographies/Jungius/popup/" href="../../Biographies/Jungius/">Ⓑ</a> <a href="../Store/jungius.html" target="_blank">Ⓣ</a> Issued by German Democratic Republic in 1957 <a href="../images/jungius.jpg" target="_blank">jungius</a> <a id="Karamata"></a>KARAMATA, Jovan <a class="mlink" data-popup="../../Biographies/Karamata/popup/" href="../../Biographies/Karamata/">Ⓑ</a> <a href="../Store/karamata.html" target="_blank">Ⓣ</a> Issued by Yugoslavia in 2002, on the hundredth anniversary of his birth <a href="../images/karamata.jpg" target="_blank">karamata</a> <a id="Karman"></a>KARMAN, Theodore von <a class="mlink" data-popup="../../Biographies/Karman/popup/" href="../../Biographies/Karman/">Ⓑ</a> <a href="../Store/karman.html" target="_blank">Ⓣ</a> Issued by Central African Republic in 1985 <a href="../images/karman9.jpg" target="_blank">karman9</a> Issued by Hungary in 1992 <a href="../images/karman1.jpg" target="_blank">karman1</a> Issued by USA in 1992 <a href="../images/karman3.jpg" target="_blank">karman3</a> Issued by Micronesia in 1993 <a href="../images/karman2.jpg" target="_blank">karman2</a> Issued by Central African Republic in 1994 <a href="../images/karman7.jpg" target="_blank">karman7</a> Issued by Chad in 1997 <a href="../images/karman8.jpg" target="_blank">karman8</a> Issued by Mali in 1999 <a href="../images/karman6.jpg" target="_blank">karman6</a> <a id="Keldysh_Mstislav"></a>KELDYSH, Mstislav Vsevolodovich <a class="mlink" data-popup="../../Biographies/Keldysh_Mstislav/popup/" href="../../Biographies/Keldysh_Mstislav/">Ⓑ</a> <a href="../Store/keldysh_mstislav.html" target="_blank">Ⓣ</a> Issued by Soviet Union in 1980 <a href="../images/keldysh3.jpg" target="_blank">keldysh3</a> Issued by Soviet Union in 1981, on his 70th birthday <a href="../images/keldysh.jpg" target="_blank">keldysh</a> Issued by Russia in 2011 <a href="../images/keldysh4.jpg" target="_blank">keldysh4</a> Issued by Soviet Union (an air-letter) <a href="../images/keldysh5.jpg" target="_blank">keldysh5</a> <a id="Kepler"></a>KEPLER, Johannes <a class="mlink" data-popup="../../Biographies/Kepler/popup/" href="../../Biographies/Kepler/">Ⓑ</a> <a href="../Store/kepler.html" target="_blank">Ⓣ</a> Issued by Austria in 1953 <a href="../images/kepler04.jpg" target="_blank">kepler04</a> Issued by Ecuador in 1966 <a href="../images/kepler07.jpg" target="_blank">kepler07</a> Issued by Yemen in 1969 <a href="../images/kepler11.jpg" target="_blank">kepler11</a> <a href="../images/kepler23.jpg" target="_blank">kepler23</a> <a href="../images/kepler60.jpg" target="_blank">kepler60</a> Issued by Ajman in 1971 <a href="../images/kepler2.jpg" target="_blank">kepler2</a> <a href="../images/kepler39.jpg" target="_blank">kepler39</a> Issued by Benin in 1971 (as Dahomey) <a href="../images/kepler21.jpg" target="_blank">kepler21</a> <a href="../images/kepler22.jpg" target="_blank">kepler22</a> Issued by Fujeira in 1971 <a href="../images/kepler15.jpg" target="_blank">kepler15</a> <a href="../images/kepler16.jpg" target="_blank">kepler16</a> <a href="../images/kepler17.jpg" target="_blank">kepler17</a> <a href="../images/kepler18.jpg" target="_blank">kepler18</a> <a href="../images/kepler19.jpg" target="_blank">kepler19</a> <a href="../images/kepler20.jpg" target="_blank">kepler20</a> Issued by German Democratic Republic in 1971 <a href="../images/kepler03.jpg" target="_blank">kepler03</a> Issued by Germany in 1971 <a href="../images/kepler33.jpg" target="_blank">kepler33</a> Issued by Mexico in 1971 <a href="../images/kepler01.jpg" target="_blank">kepler01</a> Issued by Romania in 1971 <a href="../images/kepler05.jpg" target="_blank">kepler05</a> Issued by Benin in 1975 (overwritten Dahomey stamps) <a href="../images/kepler21a.jpg" target="_blank">kepler21a</a> <a href="../images/kepler22a.jpg" target="_blank">kepler22a</a> Issued by Comoros in 1975 <a href="../images/kepler58.jpg" target="_blank">kepler58</a> Issued by Benin in 1980 <a href="../images/kepler06.jpg" target="_blank">kepler06</a> <a href="../images/kepler08.jpg" target="_blank">kepler08</a> Issued by Burundi in 1980 <a href="../images/kepler38.jpg" target="_blank">kepler38</a> Issued by Comoros in 1980 <a href="../images/kepler30.jpg" target="_blank">kepler30</a> Issued by Cook Islands in 1980 <a href="../images/kepler10.jpg" target="_blank">kepler10</a> Issued by Hungary in 1980 <a href="../images/kepler12.jpg" target="_blank">kepler12</a> Issued by Mali in 1980 <a href="../images/kepler09.jpg" target="_blank">kepler09</a> <a href="../images/kepler25.jpg" target="_blank">kepler25</a> Issued by Mongolia in 1980 <a href="../images/kepler13.jpg" target="_blank">kepler13</a> Issued by North Korea in 1980 <a href="../images/kepler35.jpg" target="_blank">kepler35</a> <a href="../images/kepler24.jpg" target="_blank">kepler24</a> Issued by Romania in 1983 <a href="../images/kepler34.jpg" target="_blank">kepler34</a> Issued by Sierra Leone in 1985 <a href="../images/kepler40.jpg" target="_blank">kepler40</a> Issued by Comoros in 1988 <a href="../images/kepler14.jpg" target="_blank">kepler14</a> <a href="../images/kepler26.jpg" target="_blank">kepler26</a> Issued by Grenada in 1991 <a href="../images/kepler28.jpg" target="_blank">kepler28</a> Issued by Sierra Leone in 1991 <a href="../images/kepler32.jpg" target="_blank">kepler32</a> Issued by Guinea in 1994 <a href="../images/kepler29.jpg" target="_blank">kepler29</a> Issued by Paraguay in 1994 <a href="../images/kepler37.jpg" target="_blank">kepler37</a> Issued by North Korea in 1999 <a href="../images/kepler31.jpg" target="_blank">kepler31</a> Issued by Sierra Leone in 2000 <a href="../images/kepler27.jpg" target="_blank">kepler27</a> Issued by Mozambique in 2001 <a href="../images/kepler36.jpg" target="_blank">kepler36</a> Issued by Guinea in 2008 <a href="../images/kepler44.jpg" target="_blank">kepler44</a> <a href="../images/kepler45.jpg" target="_blank">kepler45</a> <a href="../images/kepler50.jpg" target="_blank">kepler50</a> Issued by Guinea-Bissau in 2008 <a href="../images/kepler42.jpg" target="_blank">kepler42</a> Issued by Chad in 2009 <a href="../images/kepler46.jpg" target="_blank">kepler46</a> Issued by Czech Republic in 2009 <a href="../images/kepler41.jpg" target="_blank">kepler41</a> Issued by Germany in 2009 <a href="../images/kepler43.jpg" target="_blank">kepler43</a> Issued by Mozambique in 2009 <a href="../images/kepler47.jpg" target="_blank">kepler47</a> <a href="../images/kepler48.jpg" target="_blank">kepler48</a> Issued by Guinea in 2010 <a href="../images/kepler49.jpg" target="_blank">kepler49</a> Issued by Ivory Coast in 2012 <a href="../images/kepler54.jpg" target="_blank">kepler54</a> <a href="../images/kepler54a.jpg" target="_blank">kepler54a</a> <a href="../images/kepler56.jpg" target="_blank">kepler56</a> Issued by Marshall Islands in 2012 <a href="../images/kepler53.jpg" target="_blank">kepler53</a> <a id="Kirchhoff"></a>KIRCHHOFF, Gustav <a class="mlink" data-popup="../../Biographies/Kirchhoff/popup/" href="../../Biographies/Kirchhoff/">Ⓑ</a> <a href="../Store/kirchhoff.html" target="_blank">Ⓣ</a> Issued by German Democratic Republic in 1974, on the 150th birth anniversary <a href="../images/kirchhoff2.jpg" target="_blank">kirchhoff2</a> Issued by West Berlin in 1974, on the 150th birth anniversary <a href="../images/kirchhoff1.jpg" target="_blank">kirchhoff1</a> <a id="Kolmogorov"></a>KOLMOGOROV, Andrey <a class="mlink" data-popup="../../Biographies/Kolmogorov/popup/" href="../../Biographies/Kolmogorov/">Ⓑ</a> <a href="../Store/kolmogorov.html" target="_blank">Ⓣ</a> Issued by Portugal in 2010 <a href="../images/kolmogorov_godel_poincare.jpg" target="_blank">kolmogorov_godel_poincare</a> <a id="Kosambi"></a>KOSAMBI, Damodar Dharmananda <a class="mlink" data-popup="../../Biographies/Kosambi/popup/" href="../../Biographies/Kosambi/">Ⓑ</a> <a href="../Store/kosambi.html" target="_blank">Ⓣ</a> Issued by India in 2008 <a href="../images/kosambi.jpg" target="_blank">kosambi</a> <a id="Kovalevskaya"></a>KOVALEVSKAYA, Sofia <a class="mlink" data-popup="../../Biographies/Kovalevskaya/popup/" href="../../Biographies/Kovalevskaya/">Ⓑ</a> <a href="../Store/kovalevskaya.html" target="_blank">Ⓣ</a> Issued by Soviet Union in 1951, part of a series to honour famous Russian scientists <a href="../images/kovalev1.jpg" target="_blank">kovalev1</a> Issued by Russia in 1996 <a href="../images/kovalev2.jpg" target="_blank">kovalev2</a> Issued by Russia in 2020 (a coin) <a href="../images/kovalevskaya4.jpg" target="_blank">kovalevskaya4</a> Issued by Soviet Union (an air-letter) <a href="../images/kovalev3.jpg" target="_blank">kovalev3</a> <a id="Krylov_Aleksei"></a>KRYLOV, Aleksei N <a class="mlink" data-popup="../../Biographies/Krylov_Aleksei/popup/" href="../../Biographies/Krylov_Aleksei/">Ⓑ</a> <a href="../Store/krylov_aleksei.html" target="_blank">Ⓣ</a> Issued by Soviet Union in 1956, on the 10th anniversary of his death <a href="../images/krylov1.jpg" target="_blank">krylov1</a> Issued by Soviet Union in 1963, one of a series of stamps honouring members of the Russian Academy of Science <a href="../images/krylov2.jpg" target="_blank">krylov2</a> <a id="La_Condamine"></a>LA CONDAMINE, Charles-Marie <a class="mlink" data-popup="../../Biographies/La_Condamine/popup/" href="../../Biographies/La_Condamine/">Ⓑ</a> <a href="../Store/la_condamine.html" target="_blank">Ⓣ</a> Issued by Ecuador in 1936 <a href="../images/condamine1.jpg" target="_blank">condamine1</a> (with Ulloa and Juan) <a href="../images/condamine2.jpg" target="_blank">condamine2</a> (with Ulloa and Juan) <a href="../images/condamine3.jpg" target="_blank">condamine3</a> (with Maldonado) <a href="../images/condamine4.jpg" target="_blank">condamine4</a> (with Godin and Bouguer) <a href="../images/condamine5.jpg" target="_blank">condamine5</a> (with Godin and Bouguer) Issued by Ecuador in 1986 <a href="../images/condamine6.jpg" target="_blank">condamine6</a> Issued by France in 1986 <a href="../images/mission5.jpg" target="_blank">mission5</a> Issued by Ecuador in 1993 <a href="../images/la_condamine1.jpg" target="_blank">la_condamine1</a> <a id="Lagrange"></a>LAGRANGE, Joseph-Louis <a class="mlink" data-popup="../../Biographies/Lagrange/popup/" href="../../Biographies/Lagrange/">Ⓑ</a> <a href="../Store/lagrange.html" target="_blank">Ⓣ</a> Issued by France in 1958, part of a series 'French scientists' <a href="../images/lagrange.jpg" target="_blank">lagrange</a> <a id="Landau_Lev"></a>LANDAU, Lev <a class="mlink" data-popup="../../Biographies/Landau_Lev/popup/" href="../../Biographies/Landau_Lev/">Ⓑ</a> <a href="../Store/landau_lev.html" target="_blank">Ⓣ</a> Issued by St Vincent in 1991 <a href="../images/landau_lev6.jpg" target="_blank">landau_lev6</a> Issued by Uganda in 1995 <a href="../images/landau_lev10.jpg" target="_blank">landau_lev10</a> Issued by Israel in 1998 <a href="../images/landau_lev8.jpg" target="_blank">landau_lev8</a> Issued by Azerbaijan in 2008 <a href="../images/landau_lev1.jpg" target="_blank">landau_lev1</a> Issued by Gabon in 2008 <a href="../images/landau_lev2.jpg" target="_blank">landau_lev2</a> Issued by Guinea in 2008 <a href="../images/landau_lev3.jpg" target="_blank">landau_lev3</a> Issued by Russia in 2008 <a href="../images/landau_lev7.jpg" target="_blank">landau_lev7</a> Issued by Ukraine in 2010 <a href="../images/landau_lev4.jpg" target="_blank">landau_lev4</a> Issued by Republic of the Congo in 2018 <a href="../images/landau_lev9.jpg" target="_blank">landau_lev9</a> Issued by St Vincent <a href="../images/landau_lev5.jpg" target="_blank">landau_lev5</a> <a id="Laplace"></a>LAPLACE, Pierre Simon <a class="mlink" data-popup="../../Biographies/Laplace/popup/" href="../../Biographies/Laplace/">Ⓑ</a> <a href="../Store/laplace.html" target="_blank">Ⓣ</a> Issued by France in 1955, part of a series Famous Frenchmen, issued to benefit the Red Cross <a href="../images/laplace.jpg" target="_blank">laplace</a> Issued by Mozambique in 2001 <a href="../images/laplace2.jpg" target="_blank">laplace2</a> Issued by Guinea in 2008 <a href="../images/laplace3.jpg" target="_blank">laplace3</a> Issued by Guinea in 2010 <a href="../images/laplace4.jpg" target="_blank">laplace4</a> <a id="Lasker"></a>LASKER, Emanuel <a class="mlink" data-popup="../../Biographies/Lasker/popup/" href="../../Biographies/Lasker/">Ⓑ</a> <a href="../Store/lasker.html" target="_blank">Ⓣ</a> Issued by German Democratic Republic in 1968 <a href="../images/lasker3.jpg" target="_blank">lasker3</a> Issued by Cuba in 1976 <a href="../images/lasker4.jpg" target="_blank">lasker4</a> Issued by Cambodia in 1986 <a href="../images/lasker2.jpg" target="_blank">lasker2</a> Issued by Mongolia in 1986 <a href="../images/lasker6.jpg" target="_blank">lasker6</a> Issued by Guinea-Bissau in 1988 <a href="../images/lasker5.jpg" target="_blank">lasker5</a> Issued by Laos in 1988 <a href="../images/lasker10.jpg" target="_blank">lasker10</a> Issued by Cambodia in 1994 <a href="../images/lasker9.jpg" target="_blank">lasker9</a> Issued by Vietnam in 1994 <a href="../images/lasker11.jpg" target="_blank">lasker11</a> Issued by Yugoslavia in 1995, as part of a series honouring world chess champions <a href="../images/lasker13.jpg" target="_blank">lasker13</a> Issued by Benin in 1999 <a href="../images/lasker8.jpg" target="_blank">lasker8</a> Issued by Tadjikistan in 2000 <a href="../images/lasker1.jpg" target="_blank">lasker1</a> Issued by Myanmar in 2001 <a href="../images/lasker7.jpg" target="_blank">lasker7</a> Issued by Equatorial Guinea in 2005 <a href="../images/lasker12.jpg" target="_blank">lasker12</a> <a id="Latysheva"></a>LATYSHEVA, Klavdiya <a href="../Store/latysheva.html" target="_blank">Ⓣ</a> Issued by Ukraine in 2021 <a href="../images/latysheva1.jpg" target="_blank">latysheva1</a> <a id="Lavrentev"></a>LAVRENTEV, Mikhail Alekseevich <a class="mlink" data-popup="../../Biographies/Lavrentev/popup/" href="../../Biographies/Lavrentev/">Ⓑ</a> <a href="../Store/lavrentev.html" target="_blank">Ⓣ</a> Issued by Soviet Union in 1981 <a href="../images/lavrentev.jpg" target="_blank">lavrentev</a> <a id="Leibniz"></a>LEIBNIZ, Gottfried Wilhelm <a class="mlink" data-popup="../../Biographies/Leibniz/popup/" href="../../Biographies/Leibniz/">Ⓑ</a> <a href="../Store/leibniz.html" target="_blank">Ⓣ</a> Issued by Germany in 1926, part of a series of famous Germans <a href="../images/leibniz3.jpg" target="_blank">leibniz3</a> Issued by German Democratic Republic in 1950 <a href="../images/leibniz8.jpg" target="_blank">leibniz8</a> Issued by Germany in 1966, on the 250th anniversary of his death <a href="../images/leibniz1.jpg" target="_blank">leibniz1</a> Issued by Romania in 1966, part of the culture series 'Famous Men 1966' <a href="../images/leibniz4.jpg" target="_blank">leibniz4</a> Issued by Germany in 1980, part of the Europa series <a href="../images/leibniz2.jpg" target="_blank">leibniz2</a> Issued by St Vincent in 1991 <a href="../images/leibniz10.jpg" target="_blank">leibniz10</a> Issued by Albania in 1996 <a href="../images/leibniz7.jpg" target="_blank">leibniz7</a> Issued by Germany in 1996, on the 350th anniversary of his birth <a href="../images/leibniz5.jpg" target="_blank">leibniz5</a> Issued by Romania in 2004 <a href="../images/leibniz11.jpg" target="_blank">leibniz11</a> <a href="../images/leibniz12.jpg" target="_blank">leibniz12</a> (a postcard) <a id="Lemaitre"></a>LEMÂITRE, Georges <a class="mlink" data-popup="../../Biographies/Lemaitre/popup/" href="../../Biographies/Lemaitre/">Ⓑ</a> <a href="../Store/lemaitre.html" target="_blank">Ⓣ</a> Issued by Belgium in 1994 <a href="../images/lemaitre.jpg" target="_blank">lemaitre</a> <a id="Leonardo"></a>LEONARDO da Vinci <a class="mlink" data-popup="../../Biographies/Leonardo/popup/" href="../../Biographies/Leonardo/">Ⓑ</a> <a href="../Store/leonardo.html" target="_blank">Ⓣ</a> Issued by Italy in 1938 <a href="../images/leonardo25.jpg" target="_blank">leonardo25</a> <a href="../images/leonardo26.jpg" target="_blank">leonardo26</a> Issued by France in 1952 <a href="../images/leonardo19.jpg" target="_blank">leonardo19</a> Issued by German Democratic Republic in 1952 <a href="../images/leonardo17.jpg" target="_blank">leonardo17</a> Issued by Hungary in 1952 <a href="../images/leonardo24.jpg" target="_blank">leonardo24</a> Issued by Italy in 1952 <a href="../images/leonardo27.jpg" target="_blank">leonardo27</a> <a href="../images/leonardo29.jpg" target="_blank">leonardo29</a> Issued by Poland in 1952 <a href="../images/leonardo40.jpg" target="_blank">leonardo40</a> Issued by Romania in 1952 <a href="../images/leonardo42.jpg" target="_blank">leonardo42</a> Issued by Italy in 1967 (a banknote) <a href="../images/leonardo54.jpg" target="_blank">leonardo54</a> Issued by Albania in 1969 <a href="../images/leonardo5.jpg" target="_blank">leonardo5</a> Issued by Monaco in 1969 <a href="../images/leonardo36.jpg" target="_blank">leonardo36</a> Issued by Cuba in 1970 <a href="../images/leonardo13.jpg" target="_blank">leonardo13</a> Issued by Niger in 1970 <a href="../images/leonardo39.jpg" target="_blank">leonardo39</a> Issued by Ajman in 1971 <a href="../images/leonardo53.jpg" target="_blank">leonardo53</a> Issued by Mexico in 1977 <a href="../images/leonardo34.jpg" target="_blank">leonardo34</a> Issued by Democratic Republic of the Congo in 1978 <a href="../images/leonardo52.jpg" target="_blank">leonardo52</a> (as Zaire) Issued by Japan in 1979 <a href="../images/leonardo30.jpg" target="_blank">leonardo30</a> Issued by Cyprus in 1981 <a href="../images/leonardo15.jpg" target="_blank">leonardo15</a> <a href="../images/leonardo16.jpg" target="_blank">leonardo16</a> Issued by San Marino in 1983 <a href="../images/leonardo45.jpg" target="_blank">leonardo45</a> Issued by Spain in 1984 <a href="../images/leonardo51.jpg" target="_blank">leonardo51</a> Issued by Luxembourg in 1986 <a href="../images/leonardo31.jpg" target="_blank">leonardo31</a> Issued by Italy in 1992 (with Columbus) <a href="../images/leonardo12.jpg" target="_blank">leonardo12</a> Issued by Cuba in 1996 <a href="../images/leonardo14.jpg" target="_blank">leonardo14</a> Issued by Poland in 1999 <a href="../images/leonardo41.jpg" target="_blank">leonardo41</a> Issued by Bulgaria in 2001 <a href="../images/leonardo11.jpg" target="_blank">leonardo11</a> Issued by Bosnia and Herzegovina in 2002 <a href="../images/leonardo6.jpg" target="_blank">leonardo6</a> Issued by Macedonia in 2002 <a href="../images/leonardo32.jpg" target="_blank">leonardo32</a> Issued by Moldova in 2002 <a href="../images/leonardo35.jpg" target="_blank">leonardo35</a> Issued by Monaco in 2002 <a href="../images/leonardo37.jpg" target="_blank">leonardo37</a> Issued by Romania in 2002 <a href="../images/leonardo43.jpg" target="_blank">leonardo43</a> Issued by Somalia in 2003 <a href="../images/leonardo47.jpg" target="_blank">leonardo47</a> <a href="../images/leonardo48.jpg" target="_blank">leonardo48</a> <a href="../images/leonardo49.jpg" target="_blank">leonardo49</a> <a href="../images/leonardo50.jpg" target="_blank">leonardo50</a> Issued by Russia in 2005 <a href="../images/leonardo44.jpg" target="_blank">leonardo44</a> Issued by San Marino in 2006 <a href="../images/leonardo46.jpg" target="_blank">leonardo46</a> Issued by Bosnia and Herzegovina in 2007 <a href="../images/leonardo7.jpg" target="_blank">leonardo7</a> <a href="../images/leonardo8.jpg" target="_blank">leonardo8</a> <a href="../images/leonardo9.jpg" target="_blank">leonardo9</a> <a href="../images/leonardo10.jpg" target="_blank">leonardo10</a> Issued by Chad in 2009 <a href="../images/leonardo4.jpg" target="_blank">leonardo4</a> Issued by Mongolia in 2014 <a href="../images/leonardo38.jpg" target="_blank">leonardo38</a> Issued by Great Britain in 2019 (Leonardo prints from the Royal collection) <a href="../images/leonardo20a.jpg" target="_blank">leonardo20a</a> <a href="../images/leonardo20b.jpg" target="_blank">leonardo20b</a> <a href="../images/leonardo20c.jpg" target="_blank">leonardo20c</a> <a href="../images/leonardo20d.jpg" target="_blank">leonardo20d</a> <a id="Le_Verrier"></a>LE VERRIER, Urbain <a class="mlink" data-popup="../../Biographies/Le_Verrier/popup/" href="../../Biographies/Le_Verrier/">Ⓑ</a> <a href="../Store/le_verrier.html" target="_blank">Ⓣ</a> Issued by France in 1946 (a banknote) <a href="../images/leverrier4.jpg" target="_blank">leverrier4</a> <a href="../images/leverrier5.jpg" target="_blank">leverrier5</a> (The reverse, showing Neptune) Issued by France in 1958 <a href="../images/leverrier.jpg" target="_blank">leverrier</a> Issued by Comoros in 1975 <a href="../images/leverrier2.jpg" target="_blank">leverrier2</a> Issued by Mozambique in 2001 <a href="../images/leverrier3.jpg" target="_blank">leverrier3</a> <a id="Liu_Hui"></a>LIU HUI <a class="mlink" data-popup="../../Biographies/Liu_Hui/popup/" href="../../Biographies/Liu_Hui/">Ⓑ</a> <a href="../Store/liu_hui.html" target="_blank">Ⓣ</a> Issued by Micronesia in 1999 and showing his method of approximating π <a href="../images/liu_hui2.jpg" target="_blank">liu_hui2</a> Issued by China in 2002 <a href="../images/liu_hui.jpg" target="_blank">liu_hui</a> <a id="Llull"></a>LLULL, Ramon <a class="mlink" data-popup="../../Biographies/Llull/popup/" href="../../Biographies/Llull/">Ⓑ</a> <a href="../Store/llull.html" target="_blank">Ⓣ</a> Issued by Spain in 1963 <a href="../images/llull.jpg" target="_blank">llull</a> Issued by Andorra in 1987 (Doctrina pueril de nativitat) <a href="../images/llull3.jpg" target="_blank">llull3</a> Issued by Spain in 2016 <a href="../images/llull2.jpg" target="_blank">llull2</a> <a id="Lobachevsky"></a>LOBACHEVSKY, Nicolai Ivanovitch <a class="mlink" data-popup="../../Biographies/Lobachevsky/popup/" href="../../Biographies/Lobachevsky/">Ⓑ</a> <a href="../Store/lobachevsky.html" target="_blank">Ⓣ</a> Issued by Soviet Union in 1951, part of a series to honour famous Russian scientists <a href="../images/lobach1.jpg" target="_blank">lobach1</a> Issued by Soviet Union in 1956, on the 100th anniversary of his death <a href="../images/lobach2.jpg" target="_blank">lobach2</a> Issued by Russia in 1992, on the 200th anniversary of his birth <a href="../images/lobachevsky3.jpg" target="_blank">lobachevsky3</a> (a one rouble coin) Issued by Russia in 2017 (a postcard) <a href="../images/lobachevsky4.jpg" target="_blank">lobachevsky4</a> <a id="Lomonosov"></a>LOMONOSOV, Michael <a href="../Store/lomonosov.html" target="_blank">Ⓣ</a> Issued by Soviet Union in 1925 <a href="../images/lomonossow1.jpg" target="_blank">lomonossow1</a> <a href="../images/lomonossow2.jpg" target="_blank">lomonossow2</a> Issued by Soviet Union in 1945 <a href="../images/lomonosov16.jpg" target="_blank">lomonosov16</a> Issued by Romania in 1947 <a href="../images/lomonsov8.jpg" target="_blank">lomonsov8</a> Issued by Soviet Union in 1947 <a href="../images/lomonsov6.jpg" target="_blank">lomonsov6</a> <a href="../images/lomonsov7.jpg" target="_blank">lomonsov7</a> Issued by Soviet Union in 1956 <a href="../images/lomonosov17.jpg" target="_blank">lomonosov17</a> Issued by Romania in 1961 <a href="../images/lomonosov15.jpg" target="_blank">lomonosov15</a> Issued by Soviet Union in 1961 <a href="../images/lomonosov12.jpg" target="_blank">lomonosov12</a> Issued by Soviet Union in 1986 <a href="../images/lomonosov11.jpg" target="_blank">lomonosov11</a> Issued by Cuba in 1996 <a href="../images/lomonsov10.jpg" target="_blank">lomonsov10</a> Issued by Guinea in 2011 <a href="../images/lomonosov13.jpg" target="_blank">lomonosov13</a> <a href="../images/lomonosov23.jpg" target="_blank">lomonosov23</a> Issued by Russia in 2011 <a href="../images/lomonosov14.jpg" target="_blank">lomonosov14</a> Issued by Togo in 2011 <a href="../images/lomonosov29.jpg" target="_blank">lomonosov29</a> Issued by Vietnam in 2011 <a href="../images/lomonosov18.jpg" target="_blank">lomonosov18</a> Issued by Central African Republic in 2021 <a href="../images/lomonsov9.jpg" target="_blank">lomonsov9</a> Issued by Djibouti in 2021 <a href="../images/lomonsov3.jpg" target="_blank">lomonsov3</a> <a href="../images/lomonsov4.jpg" target="_blank">lomonsov4</a> <a href="../images/lomonsov5.jpg" target="_blank">lomonsov5</a> Issued by Guinea in 2021 <a href="../images/lomonosov19.jpg" target="_blank">lomonosov19</a> Issued by Guinea-Bissau in 2021 <a href="../images/lomonosov20.jpg" target="_blank">lomonosov20</a> <a href="../images/lomonosov21.jpg" target="_blank">lomonosov21</a> <a href="../images/lomonosov22.jpg" target="_blank">lomonosov22</a> <a id="Lorentz"></a>LORENTZ, Hendrik <a class="mlink" data-popup="../../Biographies/Lorentz/popup/" href="../../Biographies/Lorentz/">Ⓑ</a> <a href="../Store/lorentz.html" target="_blank">Ⓣ</a> Issued by Netherlands in 1928 <a href="../images/lorenz1.jpg" target="_blank">lorenz1</a> Issued by Grenada in 2002 (Carriacou and Petite Martinique) <a href="../images/lorenz_hendrik4.jpg" target="_blank">lorenz_hendrik4</a> Issued by Guinea in 2002 <a href="../images/lorentz_hendrik3.jpg" target="_blank">lorentz_hendrik3</a> Issued by Tuvalu in 2005 <a href="../images/lorentz_einstein.jpg" target="_blank">lorentz_einstein</a> Issued by Guinea-Bissau in 2009 <a href="../images/lorenz4.jpg" target="_blank">lorenz4</a> <a id="Lorenz_Edward"></a>LORENZ, Edward <a class="mlink" data-popup="../../Biographies/Lorenz_Edward/popup/" href="../../Biographies/Lorenz_Edward/">Ⓑ</a> <a href="../Store/lorenz_edward.html" target="_blank">Ⓣ</a> Issued by Guinea in 2008 <a href="../images/lorenz.jpg" target="_blank">lorenz</a> <a href="../images/lorenz2.jpg" target="_blank">lorenz2</a> <a href="../images/lorenz3.jpg" target="_blank">lorenz3</a> <a id="Lovelace"></a> LOVELACE, Ada <a class="mlink" data-popup="../../Biographies/Lovelace/popup/" href="../../Biographies/Lovelace/">Ⓑ</a> <a href="../Store/lovelace.html" target="_blank">Ⓣ</a> Issued by France in 2022 <a href="../images/lovelace1.jpg" target="_blank">lovelace1</a> <a id="Lozano"></a> LOZANO, Francisco <a href="../Store/lozano.html" target="_blank">Ⓣ</a> Issued by Peru in 2007 <a href="../images/lozano1.jpg" target="_blank">lozano1</a> <a id="Luzin"></a>LUZIN, Nikolai Nikolaevich <a class="mlink" data-popup="../../Biographies/Luzin/popup/" href="../../Biographies/Luzin/">Ⓑ</a> <a href="../Store/luzin.html" target="_blank">Ⓣ</a> Issued by Russia in 2000 <a href="../images/luzin.jpg" target="_blank">luzin</a> <a id="Lyapunov"></a>LYAPUNOV, Aleksandr Mikhailovich <a class="mlink" data-popup="../../Biographies/Lyapunov/popup/" href="../../Biographies/Lyapunov/">Ⓑ</a> <a href="../Store/lyapunov.html" target="_blank">Ⓣ</a> Issued by Soviet Union in 1957, on the 100th anniversary of his birth <a href="../images/lyapunov.jpg" target="_blank">lyapunov</a> Issued by Ukraine in 2010 <a href="../images/lyapunov2.jpg" target="_blank">lyapunov2</a> <a id="Maric-Einstein"></a>MARIĆ-EINSTEIN, Mileva <a href="../Store/maric_einstein.html" target="_blank">Ⓣ</a> Issued by Serbia in 2018 <a href="../images/maric_einstein1.jpg" target="_blank">maric_einstein1</a> <a id="Mauchly"></a>MAUCHLY, John <a class="mlink" data-popup="../../Biographies/Mauchly/popup/" href="../../Biographies/Mauchly/">Ⓑ</a> <a href="../Store/mauchly.html" target="_blank">Ⓣ</a> Issued by Madagascar in 1990 <a href="../images/mauchlyeckert1.jpg" target="_blank">mauchlyeckert1</a> <a id="Maupertuis"></a>MAUPERTUIS, Pierre <a class="mlink" data-popup="../../Biographies/Maupertuis/popup/" href="../../Biographies/Maupertuis/">Ⓑ</a> <a href="../Store/maupertuis.html" target="_blank">Ⓣ</a> Issued by Finland in 1986 <a href="../images/mission6.jpg" target="_blank">mission6</a> Issued by France in 1986 <a href="../images/mission5.jpg" target="_blank">mission5</a> <a id="Maxwell"></a>MAXWELL, James Clerk <a class="mlink" data-popup="../../Biographies/Maxwell/popup/" href="../../Biographies/Maxwell/">Ⓑ</a> <a href="../Store/maxwell.html" target="_blank">Ⓣ</a> Issued by Mexico in 1967 <a href="../images/maxwell1.jpg" target="_blank">maxwell1</a> Issued by Nicaragua in 1971 (Maxwell's equations) <a href="../images/formula1.jpg" target="_blank">formula1</a> Issued by San Marino in 1991 <a href="../images/maxwell3.jpg" target="_blank">maxwell3</a> Issued by Maldives in 2015 <a href="../images/maxwell4.jpg" target="_blank">maxwell4</a> <a id="Mazur"></a>MAZUR, Stanislaw <a class="mlink" data-popup="../../Biographies/Mazur/popup/" href="../../Biographies/Mazur/">Ⓑ</a> <a href="../Store/mazur.html" target="_blank">Ⓣ</a> Issued by Poland in 1989 <a href="../images/mazur1.jpg" target="_blank">mazur1</a> <a id="Mendel"></a>MENDEL, Gregor <a href="../Store/mendel.html" target="_blank">Ⓣ</a> Issued by Danzig in 1939 <a href="../images/mendel8.jpg" target="_blank">mendel8</a> Issued by Czechoslovakia in 1965 <a href="../images/mendel9.jpg" target="_blank">mendel9</a> Issued by Transkei in 1983 <a href="../images/mendel7.jpg" target="_blank">mendel7</a> Issued by Austria in 1984 <a href="../images/mendel4.jpg" target="_blank">mendel4</a> Issued by Germany in 1984 <a href="../images/mendel5.jpg" target="_blank">mendel5</a> Issued by Vatican City in 1984 <a href="../images/mendel6.jpg" target="_blank">mendel6</a> <a href="../images/mendel2.jpg" target="_blank">mendel2</a> Issued by Brazil in 1988 <a href="../images/mendel3.jpg" target="_blank">mendel3</a> Issued by Czech Republic in 2012 <a href="../images/mendel11.jpg" target="_blank">mendel11</a> Issued by Marshall Islands in 2012 <a href="../images/mendel1.jpg" target="_blank">mendel1</a> Issued by Germany in 2022 <a href="../images/mendel10.jpg" target="_blank">mendel10</a> <a id="Mercator_Gerardus"></a>MERCATOR, Gerardus <a class="mlink" data-popup="../../Biographies/Mercator_Gerardus/popup/" href="../../Biographies/Mercator_Gerardus/">Ⓑ</a> <a href="../Store/mercator_gerardus.html" target="_blank">Ⓣ</a> Issued by Belgium in 1942 <a href="../images/mercator1.jpg" target="_blank">mercator1</a> Issued by Belgium in 1962 <a href="../images/mercator2.jpg" target="_blank">mercator2</a> Issued by Cyprus in 1969 (a map) <a href="../images/mercator3.jpg" target="_blank">mercator3</a> Issued by Belgium in 1973 (a banknote) <a href="../images/mercator10.jpg" target="_blank">mercator10</a> <a href="../images/mercator11.jpg" target="_blank">mercator11</a> (The reverse, showing Atlas with the globe) Issued by Belgium in 1994 <a href="../images/mercator4.jpg" target="_blank">mercator4</a> Issued by Romania in 2004 (with Hondius) <a href="../images/mercator5.jpg" target="_blank">mercator5</a> Issued by Belgium in 2012 (with Hondius) <a href="../images/mercator7.jpg" target="_blank">mercator7</a> <a href="../images/mercator6.jpg" target="_blank">mercator6</a> Issued by Germany in 2012 <a href="../images/mercator8.jpg" target="_blank">mercator8</a> Issued by Netherlands in 2020 <a href="../images/mercator9.jpg" target="_blank">mercator9</a> <a id="Moalla"></a>MOALLA, Fatma <a class="mlink" data-popup="../../Biographies/Moalla/popup/" href="../../Biographies/Moalla/">Ⓑ</a> <a href="../Store/moalla.html" target="_blank">Ⓣ</a> Issued by Tunisia in 2023 <a href="../images/moalla1.jpg" target="_blank">moalla1</a> <a id="Moisil"></a>MOISIL, Grigore <a class="mlink" data-popup="../../Biographies/Moisil/popup/" href="../../Biographies/Moisil/">Ⓑ</a> <a href="../Store/moisil.html" target="_blank">Ⓣ</a> Issued by Romania in 2005 <a href="../images/moisil.jpg" target="_blank">moisil</a> <a id="Monge"></a>MONGE, Gaspard <a class="mlink" data-popup="../../Biographies/Monge/popup/" href="../../Biographies/Monge/">Ⓑ</a> <a href="../Store/monge.html" target="_blank">Ⓣ</a> Issued by France in 1953 <a href="../images/monge2.jpg" target="_blank">monge2</a> Issued by San Marino in 1982, depicting Napoleon but the smaller image is supposed to be Monge <a href="../images/monge3.jpg" target="_blank">monge3</a> Issued by France in 1990, on the 200th anniversary of the French Revolution <a href="../images/monge.jpg" target="_blank">monge</a> <a href="../images/monge4.jpg" target="_blank">monge4</a> <a id="Mumford"></a>MUMFORD, David <a class="mlink" data-popup="../../Biographies/Mumford/popup/" href="../../Biographies/Mumford/">Ⓑ</a> <a href="../Store/mumford.html" target="_blank">Ⓣ</a> Issued by Guinea in 2008 <a href="../images/mumford.jpg" target="_blank">mumford</a> <a id="Mutis"></a>MUTIS, José <a class="mlink" data-popup="../../Biographies/Mutis/popup/" href="../../Biographies/Mutis/">Ⓑ</a> <a href="../Store/mutis.html" target="_blank">Ⓣ</a> Issued by Colombia in 1947 <a href="../images/mutis4.jpg" target="_blank">mutis4</a> Issued by Colombia in 1984 (a banknote) <a href="../images/mutis2.jpg" target="_blank">mutis2</a> Issued by Spain in 1992 (a banknote) <a href="../images/mutis1.jpg" target="_blank">mutis1</a> Issued by Spain in 1993 <a href="../images/mutis3.jpg" target="_blank">mutis3</a> <a id="Napier"></a>NAPIER, John <a class="mlink" data-popup="../../Biographies/Napier/popup/" href="../../Biographies/Napier/">Ⓑ</a> <a href="../Store/napier.html" target="_blank">Ⓣ</a> Issued by Nicaragua in 1971 <a href="../images/napier1.jpg" target="_blank">napier1</a> <a id="Newton"></a>NEWTON, Isaac <a class="mlink" data-popup="../../Biographies/Newton/popup/" href="../../Biographies/Newton/">Ⓑ</a> <a href="../Store/newton.html" target="_blank">Ⓣ</a> Issued by France in 1957, part of a series 'Famous Persons' <a href="../images/newton2.jpg" target="_blank">newton2</a> Issued by Poland in 1959, part of a series to honour famous scientists <a href="../images/newton5.jpg" target="_blank">newton5</a> Issued by Paraguay in 1965 <a href="../images/newton18.jpg" target="_blank">newton18</a> <a href="../images/newton19.jpg" target="_blank">newton19</a> Issued by Yemen in 1969 <a href="../images/newton43.jpg" target="_blank">newton43</a> <a href="../images/newton37.jpg" target="_blank">newton37</a> Issued by Niger in 1970 <a href="../images/newton41.jpg" target="_blank">newton41</a> Issued by Ajman in 1971 <a href="../images/newton40.jpg" target="_blank">newton40</a> Issued by Ascension in 1971 <a href="../images/newton27.jpg" target="_blank">newton27</a> Issued by Dubai in 1971 <a href="../images/newton3.jpg" target="_blank">newton3</a> Issued by Benin in 1977, on the 250th anniversary of his death <a href="../images/newton39.jpg" target="_blank">newton39</a> Issued by Hungary in 1977 <a href="../images/newton96.jpg" target="_blank">newton96</a> Issued by Mali in 1977 <a href="../images/newton30.jpg" target="_blank">newton30</a> Issued by Mongolia in 1977 <a href="../images/newton45.jpg" target="_blank">newton45</a> Issued by Republic of the Congo in 1977 <a href="../images/newton29.jpg" target="_blank">newton29</a> Issued by Great Britain in 1978 (a banknote) <a href="../images/newton91.jpg" target="_blank">newton91</a> (See <a class="gllink" data-popup="../../Glossary/newton_note/" href="../../Glossary/#newton_note">THIS NOTE</a>) Issued by San Marino in 1982 <a href="../images/newton14.jpg" target="_blank">newton14</a> Issued by Chad in 1983 <a href="../images/newton46.jpg" target="_blank">newton46</a> Issued by Laos in 1984 <a href="../images/newton47.jpg" target="_blank">newton47</a> Issued by Central African Republic in 1985 <a href="../images/newton35.jpg" target="_blank">newton35</a> Issued by Vietnam in 1985 <a href="../images/newton6.jpg" target="_blank">newton6</a> Issued by Guinea in 1986 <a href="../images/newton36.jpg" target="_blank">newton36</a> Issued by Togo in 1986 <a href="../images/newton38.jpg" target="_blank">newton38</a> Issued by Ghana in 1987 <a href="../images/newton52.jpg" target="_blank">newton52</a> Issued by Great Britain in 1987 <a href="../images/newton7.jpg" target="_blank">newton7</a> <a href="../images/newton8.jpg" target="_blank">newton8</a> <a href="../images/newton9.jpg" target="_blank">newton9</a> <a href="../images/newton10.jpg" target="_blank">newton10</a> Issued by Grenada in 1987, as one of four stamps honouring scientists <a href="../images/newton34.jpg" target="_blank">newton34</a> Issued by Lesotho in 1987 <a href="../images/newton44.jpg" target="_blank">newton44</a> Issued by Monaco in 1987 <a href="../images/newton97.jpg" target="_blank">newton97</a> Issued by Redonda in 1987 <a href="../images/newton55.jpg" target="_blank">newton55</a> Issued by Soviet Union in 1987, part of a series 'Important Persons' (A translation of the text attached to the stamp is: 'Mathematical Principles of Natural Philosophy, the greatest work of I. Newton. For the first time a unified system of terrestrial and celestial mechanics was constructed, which became a basis of classical physics.') <a href="../images/newton4.jpg" target="_blank">newton4</a> <a href="../images/newton4a.jpg" target="_blank">newton4a</a> Issued by Uganda in 1987 <a href="../images/newton48.jpg" target="_blank">newton48</a> Issued by Maldives in 1988 <a href="../images/newton12.jpg" target="_blank">newton12</a> Issued by Bulgaria in 1993 <a href="../images/newton13.jpg" target="_blank">newton13</a> Issued by Germany in 1993, on his 350th birthday <a href="../images/newton1.jpg" target="_blank">newton1</a> Issued by North Korea in 1993 <a href="../images/newton23.jpg" target="_blank">newton23</a> <a href="../images/newton24.jpg" target="_blank">newton24</a> Issued by Guinea in 1994 <a href="../images/newton50.jpg" target="_blank">newton50</a> Issued by Nicaragua in 1994, as part of a series depicting astronomers <a href="../images/newton25.jpg" target="_blank">newton25</a> Issued by Uruguay in 1996 <a href="../images/newton33.jpg" target="_blank">newton33</a> Issued by Hungary in 1997, on the 250th anniversary of his death <a href="../images/newton11.jpg" target="_blank">newton11</a> Issued by St Vincent in 1999 <a href="../images/newton42.jpg" target="_blank">newton42</a> Issued by Burundi in 2000 <a href="../images/newton26.jpg" target="_blank">newton26</a> Issued by Grenada in 2000 <a href="../images/newton15.jpg" target="_blank">newton15</a> <a href="../images/newton16.jpg" target="_blank">newton16</a> Issued by Nevis in 2000 <a href="../images/newton32.jpg" target="_blank">newton32</a> Issued by Republic of the Congo in 2000 <a href="../images/newton28.jpg" target="_blank">newton28</a> Issued by Sierra Leone in 2000 <a href="../images/newton17.jpg" target="_blank">newton17</a> Issued by Mongolia in 2001 <a href="../images/newton51.jpg" target="_blank">newton51</a> Issued by Mozambique in 2001 <a href="../images/newton49.jpg" target="_blank">newton49</a> Issued by Guinea-Bissau in 2008 <a href="../images/newton60.jpg" target="_blank">newton60</a> Issued by Comoros in 2009 <a href="../images/newton62.jpg" target="_blank">newton62</a> Issued by Gibraltar in 2009 <a href="../images/newton57.jpg" target="_blank">newton57</a> Issued by Guinea-Bissau in 2009 <a href="../images/newton61.jpg" target="_blank">newton61</a> <a href="../images/euler_newton.jpg" target="_blank">euler_newton</a> Issued by Great Britain in 2010 <a href="../images/newton65.jpg" target="_blank">newton65</a> Issued by Marshall Islands in 2010 <a href="../images/newton67.jpg" target="_blank">newton67</a> Issued by Tristan da Cunha in 2010 <a href="../images/newton66.jpg" target="_blank">newton66</a> Issued by Gabon in 2011 <a href="../images/newton68.jpg" target="_blank">newton68</a> Issued by Grenada in 2011 <a href="../images/newton69.jpg" target="_blank">newton69</a> Issued by Togo in 2011 <a href="../images/newton71.jpg" target="_blank">newton71</a> <a href="../images/newton71a.jpg" target="_blank">newton71a</a> Issued by Ivory Coast in 2012 <a href="../images/newton81.jpg" target="_blank">newton81</a> <a href="../images/newton81a.jpg" target="_blank">newton81a</a> Issued by Marshall Islands in 2012 <a href="../images/newton80.jpg" target="_blank">newton80</a> Issued by Mozambique in 2012 <a href="../images/newton74.jpg" target="_blank">newton74</a> <a href="../images/newton75.jpg" target="_blank">newton75</a> Issued by Ivory Coast in 2013 <a href="../images/newton84.jpg" target="_blank">newton84</a> <a href="../images/newton85.jpg" target="_blank">newton85</a> <a href="../images/newton86.jpg" target="_blank">newton86</a> Issued by Gabon in 2014 <a href="../images/newton88.jpg" target="_blank">newton88</a> Issued by Mongolia in 2014 <a href="../images/newton89.jpg" target="_blank">newton89</a> Issued by Bosnia and Herzegovina in 2018 <a href="../images/newton90a.jpg" target="_blank">newton90a</a> <a href="../images/newton90b.jpg" target="_blank">newton90b</a> Issued by France in 2022(Referencing the 1957 stamp) <a href="../images/newton98.jpg" target="_blank">newton98</a> <a href="../images/newton99.jpg" target="_blank">newton99</a> <a href="../images/newton100.jpg" target="_blank">newton100</a> <a href="../images/newton101.jpg" target="_blank">newton101</a> <a id="Nightingale"></a>NIGHTINGALE, Florence <a class="mlink" data-popup="../../Biographies/Nightingale/popup/" href="../../Biographies/Nightingale/">Ⓑ</a> <a href="../Store/nightingale.html" target="_blank">Ⓣ</a> Issued by Belgium in 1939 <a href="../images/nightingale25.jpg" target="_blank">nightingale25</a> Issued by Costa Rica in 1949 <a href="../images/nightingale24.jpg" target="_blank">nightingale24</a> Issued by Turkey in 1954 <a href="../images/nightingale27.jpg" target="_blank">nightingale27</a> Issued by Australia in 1955 <a href="../images/nightingale12.jpg" target="_blank">nightingale12</a> Issued by Germany in 1955 <a href="../images/nightingale31.jpg" target="_blank">nightingale31</a> Issued by Dominica in 1968 <a href="../images/nightingale8.jpg" target="_blank">nightingale8</a> Issued by Surinam in 1973 <a href="../images/nightingale20.jpg" target="_blank">nightingale20</a> Issued by Seychelles in 1975 <a href="../images/nightingale13.jpg" target="_blank">nightingale13</a> Issued by Great Britain in 1978 (a banknote) <a href="../images/nightingale3.jpg" target="_blank">nightingale3</a> Issued by Antigua and Barbuda in 1981 <a href="../images/nightingale16.jpg" target="_blank">nightingale16</a> Issued by Dominica in 1982 <a href="../images/nightingale30.jpg" target="_blank">nightingale30</a> Issued by British Virgin Islands in 1983 <a href="../images/nightingale1.jpg" target="_blank">nightingale1</a> Issued by Transkei in 1983 <a href="../images/nightingale2.jpg" target="_blank">nightingale2</a> Issued by Hungary in 1989 <a href="../images/nightingal10.jpg" target="_blank">nightingal10</a> Issued by Niger in 1998 <a href="../images/nightingale5.jpg" target="_blank">nightingale5</a> Issued by Uganda in 2000 <a href="../images/nightingale26.jpg" target="_blank">nightingale26</a> Issued by Alderney in 2010 <a href="../images/nightingale29.jpg" target="_blank">nightingale29</a> Issued by Liberia in 2010 <a href="../images/nightingale17.jpg" target="_blank">nightingale17</a> Issued by Jersey in 2011 <a href="../images/nightingale9.jpg" target="_blank">nightingale9</a> Issued by Bosnia and Herzegovina in 2020 <a href="../images/nightingale15.jpg" target="_blank">nightingale15</a> Issued by Cyprus in 2020 <a href="../images/nightingale28.jpg" target="_blank">nightingale28</a> Issued by Gibraltar in 2020 <a href="../images/nightingale22.jpg" target="_blank">nightingale22</a> Issued by Macedonia in 2020 <a href="../images/nightingale21.jpg" target="_blank">nightingale21</a> Issued by Moldova in 2020 <a href="../images/nightingale14.jpg" target="_blank">nightingale14</a> Issued by Portugal in 2020 <a href="../images/nightingale19.jpg" target="_blank">nightingale19</a> Issued by Sierra Leone in 2020 <a href="../images/nightingale11.jpg" target="_blank">nightingale11</a> Issued by United Nations Organisation in 2020 <a href="../images/nightingale23.jpg" target="_blank">nightingale23</a> Issued by Uruguay in 2020 <a href="../images/nightingale18.jpg" target="_blank">nightingale18</a> Issued by Italy in 2021 <a href="../images/nightingale6.jpg" target="_blank">nightingale6</a> Issued by Spain in 2023 <a href="../images/nightingale7.jpg" target="_blank">nightingale7</a> <a id="Nunes"></a>NUNES, Pedro <a class="mlink" data-popup="../../Biographies/Nunes/popup/" href="../../Biographies/Nunes/">Ⓑ</a> <a href="../Store/nunes.html" target="_blank">Ⓣ</a> Issued by Portugal in 1957 (a banknote) <a href="../images/nunes7.jpg" target="_blank">nunes7</a> Issued by Portugal in 1978 <a href="../images/nunes.jpg" target="_blank">nunes</a> (showing 'Nonio' navigational instrument and diagram from Tratado da Rumaçao do Globo) <a href="../images/nunes4.jpg" target="_blank">nunes4</a> Issued by Portugal in 2002, on the 500th anniversary of his birth <a href="../images/nunes2.jpg" target="_blank">nunes2</a> <a href="../images/nunes3.jpg" target="_blank">nunes3</a> (the commemorative sheet) Issued by Portugal in 2018 <a href="../images/nunes5.jpg" target="_blank">nunes5</a> <a href="../images/nunes6.jpg" target="_blank">nunes6</a> <a id="Obreshkov"></a>OBRESHKOV, Nikola <a href="../Store/obreshkov.html" target="_blank">Ⓣ</a> Issued by Bulgaria in 2021 <a href="../images/obreshkov1.jpg" target="_blank">obreshkov1</a> <a id="Ohm"></a>OHM, Georg <a class="mlink" data-popup="../../Biographies/Ohm/popup/" href="../../Biographies/Ohm/">Ⓑ</a> <a href="../Store/ohm.html" target="_blank">Ⓣ</a> Issued by Germany in 1994 <a href="../images/ohm1.jpg" target="_blank">ohm1</a> Issued by Ivory Coast in 2016 <a href="../images/ohm2.jpg" target="_blank">ohm2</a> <a href="../images/ohm4.jpg" target="_blank">ohm4</a> <a id="Okounkov"></a>OKOUNKOV, Andrei <a class="mlink" data-popup="../../Biographies/Okounkov/popup/" href="../../Biographies/Okounkov/">Ⓑ</a> <a href="../Store/okounkov.html" target="_blank">Ⓣ</a> Issued by Guinea in 2008 <a href="../images/okounkov.jpg" target="_blank">okounkov</a> <a id="Khayyam"></a>OMAR KHAYYAM <a class="mlink" data-popup="../../Biographies/Khayyam/popup/" href="../../Biographies/Khayyam/">Ⓑ</a> <a href="../Store/khayyam.html" target="_blank">Ⓣ</a> Issued by Dubai in 1967 <a href="../images/omar5.jpg" target="_blank">omar5</a> Issued by Dubai in 1976 <a href="../images/omar3a.jpg" target="_blank">omar3a</a> <a href="../images/omar3b.jpg" target="_blank">omar3b</a> <a href="../images/omar3c.jpg" target="_blank">omar3c</a> Issued by Albania in 1996 <a href="../images/omar1.jpg" target="_blank">omar1</a> <a href="../images/omar2.jpg" target="_blank">omar2</a> Issued by Micronesia in 1999 <a href="../images/omar7.jpg" target="_blank">omar7</a> Issued by Guyana in 2000 <a href="../images/omar6.jpg" target="_blank">omar6</a> Issued by Iran in 2018 <a href="../images/omar9.jpg" target="_blank">omar9</a> Issued by Sierra Leone in 2022 <a href="../images/omar11.jpg" target="_blank">omar11</a> Issued by Krygyzstan in 2023 <a href="../images/omar10.jpg" target="_blank">omar10</a> Issued by Sierra Leone in 2023 <a href="../images/omar11.jpg" target="_blank">omar11</a> <a id="Onicescu"></a>ONICESCU, Octav <a class="mlink" data-popup="../../Biographies/Onicescu/popup/" href="../../Biographies/Onicescu/">Ⓑ</a> <a href="../Store/onicescu.html" target="_blank">Ⓣ</a> Issued by Romania in 1992 <a href="../images/onicescu.jpg" target="_blank">onicescu</a> <a id="Opik"></a>ÖPIK, Ernst <a class="mlink" data-popup="../../Biographies/Opik/popup/" href="../../Biographies/Opik/">Ⓑ</a> <a href="../Store/opik.html" target="_blank">Ⓣ</a> Issued by Mauritania in 1986 <a href="../images/opik2.jpg" target="_blank">opik2</a> Issued by Mali in 1995 <a href="../images/opik1.jpg" target="_blank">opik1</a> <a id="Ortelius"></a>ORTELIUS, Abraham <a href="../Store/ortelius.html" target="_blank">Ⓣ</a> Issued by Belgium in 1942 <a href="../images/ortelius1.jpg" target="_blank">ortelius1</a> Issued by Netherlands in 2020 <a href="../images/ortelius2.jpg" target="_blank">ortelius2</a> <a id="Ostrogradski"></a>OSTROGRADSKI, Mikhail <a class="mlink" data-popup="../../Biographies/Ostrogradski/popup/" href="../../Biographies/Ostrogradski/">Ⓑ</a> <a href="../Store/ostrogradski.html" target="_blank">Ⓣ</a> Issued by Soviet Union in 1951 <a href="../images/ostrogradski1.jpg" target="_blank">ostrogradski1</a> <a id="Pacioli"></a>PACIOLI, Fra Luca <a class="mlink" data-popup="../../Biographies/Pacioli/popup/" href="../../Biographies/Pacioli/">Ⓑ</a> <a href="../Store/pacioli.html" target="_blank">Ⓣ</a> Issued by Sri Lanka in 1984 <a href="../images/pacioli2a.jpg" target="_blank">pacioli2a</a> Issued by Italy in 1994 <a href="../images/pacioli1.jpg" target="_blank">pacioli1</a> (See <a class="gllink" data-popup="../../Glossary/pacioli_note/" href="../../Glossary/#pacioli_note">THIS NOTE</a>) <a id="Panini"></a>PANINI <a class="mlink" data-popup="../../Biographies/Panini/popup/" href="../../Biographies/Panini/">Ⓑ</a> <a href="../Store/panini.html" target="_blank">Ⓣ</a> Issued by India in 2004 <a href="../images/panini.jpg" target="_blank">panini</a> <a id="Papin"></a>PAPIN, Denis <a class="mlink" data-popup="../../Biographies/Papin/popup/" href="../../Biographies/Papin/">Ⓑ</a> <a href="../Store/papin.html" target="_blank">Ⓣ</a> Issued by France in 1962 <a href="../images/papin1.jpg" target="_blank">papin1</a> Issued by France in 2023 <a href="../images/papin2.jpg" target="_blank">papin2</a> <a id="Pascal"></a>PASCAL, Blaise <a class="mlink" data-popup="../../Biographies/Pascal/popup/" href="../../Biographies/Pascal/">Ⓑ</a> <a href="../Store/pascal.html" target="_blank">Ⓣ</a> Issued by France in 1944, part of a series honouring famous French persons <a href="../images/pascal2.jpg" target="_blank">pascal2</a> Issued by France in 1962, on the 300th anniversary of his death <a href="../images/pascal.jpg" target="_blank">pascal</a> Issued by Monaco in 1973, on the 350th anniversary of his birth <a href="../images/pascal3.jpg" target="_blank">pascal3</a> Issued by France in 1990 (a banknote) <a href="../images/pascal10.jpg" target="_blank">pascal10</a> (showing the Tour St Jacques) <a href="../images/pascal11.jpg" target="_blank">pascal11</a> (showing the Abbey of Port Royale) Issued by Central African Republic in 2000 <a href="../images/pascal4.jpg" target="_blank">pascal4</a> (Pascal is not named on the stamp but it appears to be him) Issued by Cambodia in 2001 <a href="../images/pascal5.jpg" target="_blank">pascal5</a> Issued by Sao Tome and Principe in 2008 <a href="../images/pascal6.jpg" target="_blank">pascal6</a> Issued by Guinea in 2009 <a href="../images/pascal7a.jpg" target="_blank">pascal7a</a> <a href="../images/pascal7b.jpg" target="_blank">pascal7b</a> <a href="../images/pascal8.jpg" target="_blank">pascal8</a> Issued by Bosnia and Herzegovina in 2023 <a href="../images/pascal14.jpg" target="_blank">pascal14</a> Issued by Czech Republic in 2023 <a href="../images/pascal13.jpg" target="_blank">pascal13</a> Issued by France in 2023 <a href="../images/pascal12.jpg" target="_blank">pascal12</a> Issued by Macedonia in 2023 <a href="../images/pascal17.jpg" target="_blank">pascal17</a> Issued by Monaco in 2023 <a href="../images/pascal16.jpg" target="_blank">pascal16</a> Issued by Portugal in 2023 <a href="../images/pascal15.jpg" target="_blank">pascal15</a> Issued by Krygyzstan in 2024 <a href="../images/pascal18.jpg" target="_blank">pascal18</a> <a id="Pauli"></a>PAULI, Wolfgang <a class="mlink" data-popup="../../Biographies/Pauli/popup/" href="../../Biographies/Pauli/">Ⓑ</a> <a href="../Store/pauli.html" target="_blank">Ⓣ</a> Issued by Austria in 1983 <a href="../images/pauli1.jpg" target="_blank">pauli1</a> Issued by Grenada in 1995 <a href="../images/pauli3.jpg" target="_blank">pauli3</a> Issued by Guinea in 2006 <a href="../images/pauli2.jpg" target="_blank">pauli2</a> <a id="Penrose"></a>PENROSE, Roger <a class="mlink" data-popup="../../Biographies/Penrose/popup/" href="../../Biographies/Penrose/">Ⓑ</a> <a href="../Store/penrose.html" target="_blank">Ⓣ</a> Issued by Guinea in 2010 <a href="../images/penrose.jpg" target="_blank">penrose</a> Issued by Djibouti in 2020 <a href="../images/penrose2.jpg" target="_blank">penrose2</a> <a id="Petrovic"></a>PETROVIC, Mihailo <a class="mlink" data-popup="../../Biographies/Petrovic/popup/" href="../../Biographies/Petrovic/">Ⓑ</a> <a href="../Store/petrovic.html" target="_blank">Ⓣ</a> Issued by Yugoslavia in 1993, on the 50th anniversary of his death <a href="../images/petrovic.jpg" target="_blank">petrovic</a> Issued by Bosnia and Herzegovina in 2018 <a href="../images/petrovic2.jpg" target="_blank">petrovic2</a> Issued by Serbia in 2018 <a href="../images/petrovic3.jpg" target="_blank">petrovic3</a> <a id="Petrovsky"></a>PETROVSKY, Ivan Georgievich <a class="mlink" data-popup="../../Biographies/Petrovsky/popup/" href="../../Biographies/Petrovsky/">Ⓑ</a> <a href="../Store/petrovsky.html" target="_blank">Ⓣ</a> Issued by Soviet Union in 1973, one of a series of four stamps honouring scientists and academicians <a href="../images/petrovsky.jpg" target="_blank">petrovsky</a> <a id="Piazzi"></a>PIAZZI, Guiseppe <a class="mlink" data-popup="../../Biographies/Piazzi/popup/" href="../../Biographies/Piazzi/">Ⓑ</a> <a href="../Store/piazzi.html" target="_blank">Ⓣ</a> Issued by Guinea in 2010 <a href="../images/piazzi.jpg" target="_blank">piazzi</a> <a id="Planck"></a>PLANCK, Max <a class="mlink" data-popup="../../Biographies/Planck/popup/" href="../../Biographies/Planck/">Ⓑ</a> <a href="../Store/planck.html" target="_blank">Ⓣ</a> Issued by German Democratic Republic in 1950 <a href="../images/planck15.jpg" target="_blank">planck15</a> Issued by German Democratic Republic in 1958 <a href="../images/planck13.jpg" target="_blank">planck13</a> Issued by German Democratic Republic in 1958 <a href="../images/planck18.jpg" target="_blank">planck18</a> Issued by West Berlin in 1963 <a href="../images/planck4.jpg" target="_blank">planck4</a> Issued by Uruguay in 1977 <a href="../images/planck9.jpg" target="_blank">planck9</a> Issued by Ivory Coast in 1978 <a href="../images/planck11.jpg" target="_blank">planck11</a> Issued by Sweden in 1978 <a href="../images/planck8.jpg" target="_blank">planck8</a> Issued by Cuba in 1994 <a href="../images/planck7.jpg" target="_blank">planck7</a> Issued by Ghana in 1995 <a href="../images/planck6.jpg" target="_blank">planck6</a> Issued by Germany in 1998 <a href="../images/planck19.jpg" target="_blank">planck19</a> Issued by Gambia in 2000 <a href="../images/planck10.jpg" target="_blank">planck10</a> Issued by Portugal in 2000 <a href="../images/planck_einstein_bohr.jpg" target="_blank">planck_einstein_bohr</a> (with Einstein and Bohr) Issued by Costa Rica in 2005 <a href="../images/planck12.jpg" target="_blank">planck12</a> Issued by Gabon in 2008 <a href="../images/planck1.jpg" target="_blank">planck1</a> Issued by Germany in 2008 <a href="../images/planck2.jpg" target="_blank">planck2</a> Issued by Germany in 2008 <a href="../images/planck16.jpg" target="_blank">planck16</a> Issued by Comoros in 2009 <a href="../images/planck5.jpg" target="_blank">planck5</a> Issued by Guinea-Bissau in 2009 <a href="../images/planck3.jpg" target="_blank">planck3</a> Issued by Maldives in 2018 <a href="../images/planck14.jpg" target="_blank">planck14</a> Issued by Maldives in 2018 <a href="../images/planck17.jpg" target="_blank">planck17</a> <a id="Plateau"></a>PLATEAU, Joseph <a class="mlink" data-popup="../../Biographies/Plateau/popup/" href="../../Biographies/Plateau/">Ⓑ</a> <a href="../Store/plateau.html" target="_blank">Ⓣ</a> Issued by Belgium in 1947 <a href="../images/plateau1.jpg" target="_blank">plateau1</a> <a id="Plato">PLATO </a><a class="mlink" data-popup="../../Biographies/Plato/popup/" href="../../Biographies/Plato/">Ⓑ</a> <a href="../Store/plato.html" target="_blank">Ⓣ</a> Issued by Greece in 1998 <a href="../images/plato3.jpg" target="_blank">plato3</a> Issued by Spain in 2010 <a href="../images/plato2.jpg" target="_blank">plato2</a> Issued by Greece in 2013 <a href="../images/plato.jpg" target="_blank">plato</a> (One stamp has the phrase "Let no one untrained in geometry enter", said to have been written above the entrance to Plato's Academy.) Issued by Greece in 2016 <a href="../images/aristotle13.jpg" target="_blank">aristotle13</a> (with Aristotle) <a id="Poincare"></a>POINCARÉ, Henri <a class="mlink" data-popup="../../Biographies/Poincare/popup/" href="../../Biographies/Poincare/">Ⓑ</a> <a href="../Store/poincare.html" target="_blank">Ⓣ</a> Issued by France in 1952, as part of a series honouring famous French persons of the second half of the 19th century <a href="../images/poincare.jpg" target="_blank">poincare</a> Issued by Portugal in 2000 (with Gödel and Kolmogorov) <a href="../images/kolmogorov_godel_poincare.jpg" target="_blank">kolmogorov_godel_poincare</a> <a id="Ptolemy"></a>PTOLEMY, Claudius <a class="mlink" data-popup="../../Biographies/Ptolemy/popup/" href="../../Biographies/Ptolemy/">Ⓑ</a> <a href="../Store/ptolemy.html" target="_blank">Ⓣ</a> Issued by Yemen in 1969 <a href="../images/ptolemy2.jpg" target="_blank">ptolemy2</a> Issued by Burundi in 1973 <a href="../images/ptolemy.jpg" target="_blank">ptolemy</a> <a id="Pythagoras"></a>PYTHAGORAS <a class="mlink" data-popup="../../Biographies/Pythagoras/popup/" href="../../Biographies/Pythagoras/">Ⓑ</a> <a href="../Store/pythagoras.html" target="_blank">Ⓣ</a> Issued by Greece in 1955, to commemorate Pythagoras's Congress and the 2500th anniversary of the founding of the first school of philosophy by Pythagoras <a href="../images/pythag.jpg" target="_blank">pythag</a> <a href="../images/pythag2.jpg" target="_blank">pythag2</a> <a href="../images/pythag4.jpg" target="_blank">pythag4</a> <a href="../images/theorem.jpg" target="_blank">theorem</a> Issued by Nicaragua in 1971 <a href="../images/formula5.jpg" target="_blank">formula5</a> Issued by Suriname in 1972 <a href="../images/theorem2.jpg" target="_blank">theorem2</a> Issued by San Marino in 1982 <a href="../images/pythag3.jpg" target="_blank">pythag3</a> Issued by Switzerland in 1983 <a href="../images/pythagoras9.jpg" target="_blank">pythagoras9</a> Issued by Japan in 1984 <a href="../images/pythagoras7.jpg" target="_blank">pythagoras7</a> Issued by Sierra Leone in 1984 <a href="../images/pythagoras8.jpg" target="_blank">pythagoras8</a> Issued by Vatican City in 1986, from Raphael's School of Athens <a href="../images/vatican2.jpg" target="_blank">vatican2</a> Issued by Macedonia in 1998, to commemorate the 2500th anniversary of the death of Pythagoras <a href="../images/pythagoras6.jpg" target="_blank">pythagoras6</a> Issued by Philippines in 2001 <a href="../images/pythagoras10.jpg" target="_blank">pythagoras10</a> Issued by South Korea in 2014 <a href="../images/theorem3.jpg" target="_blank">theorem3</a> <a id="Quetelet"></a>QUETELET, Adolphe <a class="mlink" data-popup="../../Biographies/Quetelet/popup/" href="../../Biographies/Quetelet/">Ⓑ</a> <a href="../Store/quetelet.html" target="_blank">Ⓣ</a> Issued by Belgium in 1974, on the centenary of his death <a href="../images/quetelet.jpg" target="_blank">quetelet</a> Issued by Belgium in 2017 (BMI) <a href="../images/quetelet2.jpg" target="_blank">quetelet2</a> <a id="Qushji"></a>QUSHJI Ala al-Din Ali ibn Muhammed, known as Ali Qushji, Latin: Ali Kushgii <a class="mlink" data-popup="../../Biographies/Qushji/popup/" href="../../Biographies/Qushji/">Ⓑ</a> <a href="../Store/qushji.html" target="_blank">Ⓣ</a> Issued by Turkey in 2009 <a href="../images/qushji.jpg" target="_blank">qushji</a> <a id="Ramanujan"></a>RAMANUJAN, Srinivasa <a class="mlink" data-popup="../../Biographies/Ramanujan/popup/" href="../../Biographies/Ramanujan/">Ⓑ</a> <a href="../Store/ramanujan.html" target="_blank">Ⓣ</a> Issued by India in 2010, on the 100th anniversary of his birth <a href="../images/ramanujan3.jpg" target="_blank">ramanujan3</a> <a href="../images/raman.jpg" target="_blank">raman</a> Issued by India in 2011 <a href="../images/ramanujan2.jpg" target="_blank">ramanujan2</a> Issued by India in 2016 <a href="../images/ramanujan4.jpg" target="_blank">ramanujan4</a> <a id="Rayleigh"></a>RAYLEIGH (Lord) also known as John Strutt <a class="mlink" data-popup="../../Biographies/Rayleigh/popup/" href="../../Biographies/Rayleigh/">Ⓑ</a> <a href="../Store/rayleigh.html" target="_blank">Ⓣ</a> Issued by Sweden in 1964 <a href="../images/rayleigh3.jpg" target="_blank">rayleigh3</a> Issued by Grenada in 1995 <a href="../images/rayleigh2.jpg" target="_blank">rayleigh2</a> Issued by Guinea-Bissau in 2009 <a href="../images/rayleigh1.jpg" target="_blank">rayleigh1</a> <a id="Regiomontanus"></a>REGIOMONTANUS, Johannes <a class="mlink" data-popup="../../Biographies/Regiomontanus/popup/" href="../../Biographies/Regiomontanus/">Ⓑ</a> <a href="../Store/regiomontanus.html" target="_blank">Ⓣ</a> Issued by Hungary in 2017 <a href="../images/regiomontanus1.jpg" target="_blank">regiomontanus1</a> <a id="Rejewski"></a>REJEWSKI, Marian <a class="mlink" data-popup="../../Biographies/Rejewski/popup/" href="../../Biographies/Rejewski/">Ⓑ</a> <a href="../Store/rejewski.html" target="_blank">Ⓣ</a> Issued by Poland in 2009 <a href="../images/rozycki_rejewski_zygalski.jpg" target="_blank">rozycki_rejewski_zygalski</a> <a id="Rey_Pastor"></a>REY Pastor, Julio <a class="mlink" data-popup="../../Biographies/Rey_Pastor/popup/" href="../../Biographies/Rey_Pastor/">Ⓑ</a> <a href="../Store/rey_pastor.html" target="_blank">Ⓣ</a> Issued by Spain in 2000 <a href="../images/rey_pastor1.jpg" target="_blank">rey_pastor1</a> <a id="Ribeiro"></a>RIBEIRO, Maria Pilar <a class="mlink" data-popup="../../Biographies/Ribeiro/popup/" href="../../Biographies/Ribeiro/">Ⓑ</a> <a href="../Store/ribeiro.html" target="_blank">Ⓣ</a> Issued by Portugal in 2011 <a href="../images/ribeiro.jpg" target="_blank">ribeiro</a> <a id="Ricci_Matteo"></a>RICCI, Matteo <a class="mlink" data-popup="../../Biographies/Ricci_Matteo/popup/" href="../../Biographies/Ricci_Matteo/">Ⓑ</a> <a href="../Store/ricci_matteo.html" target="_blank">Ⓣ</a> Issued by Taiwan in 1983 <a href="../images/ricci6.jpg" target="_blank">ricci6</a> Issued by Italy in 2002 <a href="../images/ricci3.jpg" target="_blank">ricci3</a> Issued by Macau China in 2006 <a href="../images/ricci4.jpg" target="_blank">ricci4</a> <a href="../images/ricci5.jpg" target="_blank">ricci5</a> Issued by Guinea-Bissau in 2010 <a href="../images/ricci.jpg" target="_blank">ricci</a> <a href="../images/ricci2.jpg" target="_blank">ricci2</a> Issued by Sovereign Military Order of Malta in 2010 <a href="../images/ricci9.jpg" target="_blank">ricci9</a> Issued by Vatican City in 2010 <a href="../images/ricci7.jpg" target="_blank">ricci7</a> <a href="../images/ricci8.jpg" target="_blank">ricci8</a> <a href="../images/ricci11.jpg" target="_blank">ricci11</a> <a id="Ries"></a>RIESE, Adam <a class="mlink" data-popup="../../Biographies/Ries/popup/" href="../../Biographies/Ries/">Ⓑ</a> <a href="../Store/ries.html" target="_blank">Ⓣ</a> Issued by Germany in 1959, on the 400th death anniversary <a href="../images/riese.jpg" target="_blank">riese</a> Issued by Germany in 1992, on the 500th birth anniversary <a href="../images/riese2.jpg" target="_blank">riese2</a> <a id="Riemann"></a>RIEMANN, Bernhard <a class="mlink" data-popup="../../Biographies/Riemann/popup/" href="../../Biographies/Riemann/">Ⓑ</a> <a href="../Store/riemann.html" target="_blank">Ⓣ</a> Issued by Romania in 1966 (a postcard) <a href="../images/riemann1.jpg" target="_blank">riemann1</a> <a id="Roberval"></a>ROBERVAL, Gilles de <a class="mlink" data-popup="../../Biographies/Roberval/popup/" href="../../Biographies/Roberval/">Ⓑ</a> <a href="../Store/roberval.html" target="_blank">Ⓣ</a> Issued by France in 2017 <a href="../images/roberval1.jpg" target="_blank">roberval1</a> (showing Roberval's balance) <a id="Romer"></a>RØMER, Ole <a href="../Store/romer.html" target="_blank">Ⓣ</a> Issued by Denmark in 1944 <a href="../images/romer1.jpg" target="_blank">romer1</a> <a id="Rozycki"></a>ROZYCKI, Jerzy <a class="mlink" data-popup="../../Biographies/Rozycki/popup/" href="../../Biographies/Rozycki/">Ⓑ</a> <a href="../Store/rozycki.html" target="_blank">Ⓣ</a> Issued by Poland in 2009 <a href="../images/rozycki_rejewski_zygalski.jpg" target="_blank">rozycki_rejewski_zygalski</a> <a id="Ruffini"></a>RUFFINI, Paolo <a class="mlink" data-popup="../../Biographies/Ruffini/popup/" href="../../Biographies/Ruffini/">Ⓑ</a> <a href="../Store/ruffini.html" target="_blank">Ⓣ</a> Issued by Italy in 2022 <a href="../images/ruffini1.jpg" target="_blank">ruffini1</a> <a id="Russell"></a>RUSSELL, Bertrand <a class="mlink" data-popup="../../Biographies/Russell/popup/" href="../../Biographies/Russell/">Ⓑ</a> <a href="../Store/russell.html" target="_blank">Ⓣ</a> Issued by Grenada in 1971 <a href="../images/russell6.jpg" target="_blank">russell6</a> Issued by India in 1972, on his birth centennial <a href="../images/russell1.jpg" target="_blank">russell1</a> Issued by Comoros in 1977, showing Russell among other winners of the Nobel prize for literature <a href="../images/russell4.jpg" target="_blank">russell4</a> Issued by Upper Volta in 1977 <a href="../images/russell5.jpg" target="_blank">russell5</a> Issued by St Lucia in 1982 <a href="../images/russell7.jpg" target="_blank">russell7</a> Issued by Grenada in 1986 <a href="../images/russell8.jpg" target="_blank">russell8</a> Issued by Palau in 2001 <a href="../images/russell2.jpg" target="_blank">russell2</a> <a id="Schmidt_Otto"></a>SCHMIDT, Otto Yulevich <a class="mlink" data-popup="../../Biographies/Schmidt_Otto/popup/" href="../../Biographies/Schmidt_Otto/">Ⓑ</a> <a href="../Store/schmidt_otto.html" target="_blank">Ⓣ</a> Issued by Soviet Union in 1966, one of a series of stamps honouring Soviet scientists <a href="../images/schmidt.jpg" target="_blank">schmidt</a> Issued by Soviet Union in 1980 <a href="../images/schmidt2.jpg" target="_blank">schmidt2</a> Issued by Russia in 1996 <a href="../images/schmidt3.jpg" target="_blank">schmidt3</a> Issued by Belarus in 2001 <a href="../images/schmidt_otto4.jpg" target="_blank">schmidt_otto4</a> <a id="Schrodinger"></a>SCHRÖDINGER, Erwin <a class="mlink" data-popup="../../Biographies/Schrodinger/popup/" href="../../Biographies/Schrodinger/">Ⓑ</a> <a href="../Store/schrodinger.html" target="_blank">Ⓣ</a> Issued by Sweden in 1982 <a href="../images/schrodinger2.jpg" target="_blank">schrodinger2</a> Issued by Austria in 1983 (a banknote) <a href="../images/schrodinger4.jpg" target="_blank">schrodinger4</a> Issued by Austria in 1987 <a href="../images/schrodinger1.jpg" target="_blank">schrodinger1</a> <a id="Schwartz"></a>SCHWARTZ, Laurent <a class="mlink" data-popup="../../Biographies/Schwartz/popup/" href="../../Biographies/Schwartz/">Ⓑ</a> <a href="../Store/schwartz.html" target="_blank">Ⓣ</a> Issued by Guinea in 2008 <a href="../images/schwartz.jpg" target="_blank">schwartz</a> <a id="Schwarz_Stefan"></a>SCHWARZ, Stefan <a class="mlink" data-popup="../../Biographies/Schwarz_Stefan/popup/" href="../../Biographies/Schwarz_Stefan/">Ⓑ</a> <a href="../Store/schwarz_stefan.html" target="_blank">Ⓣ</a> Issued by Slovakia in 2000 <a href="../images/hronec_schwarz_stefan.jpg" target="_blank">hronec_schwarz_stefan</a> <a id="Secchi"></a>SECCHI, Angelo <a href="../Store/secchi.html" target="_blank">Ⓣ</a> Issued by Vatican City in 1978 <a href="../images/secchi2.jpg" target="_blank">secchi2</a> <a href="../images/secchi4.jpg" target="_blank">secchi4</a> <a href="../images/secchi5.jpg" target="_blank">secchi5</a> Issued by Vatican City in 2018 <a href="../images/secchi1.jpg" target="_blank">secchi1</a> Issued by Italy in 2018 <a href="../images/secchi6.jpg" target="_blank">secchi6</a> <a id="Segner"></a>SEGNER, Johann Andreas <a class="mlink" data-popup="../../Biographies/Segner/popup/" href="../../Biographies/Segner/">Ⓑ</a> <a href="../Store/segner.html" target="_blank">Ⓣ</a> Issued by Hungary in 1974 <a href="../images/segner3.jpg" target="_blank">segner3</a> Issued by Slovakia in 1994 <a href="../images/segner2.jpg" target="_blank">segner2</a> Issued by Hungary in 2004 <a href="../images/segner1.jpg" target="_blank">segner1</a> <a id="Seki"></a>SEKI KOWA <a class="mlink" data-popup="../../Biographies/Seki/popup/" href="../../Biographies/Seki/">Ⓑ</a> <a href="../Store/seki.html" target="_blank">Ⓣ</a> Issued by Japan in 1992, on the 350th birthday <a href="../images/seki.jpg" target="_blank">seki</a> <a id="Severi"></a>SEVERI, Francesco <a class="mlink" data-popup="../../Biographies/Severi/popup/" href="../../Biographies/Severi/">Ⓑ</a> <a href="../Store/severi.html" target="_blank">Ⓣ</a> Issued by Italy in 1979, on the 100th birth anniversary <a href="../images/severi.jpg" target="_blank">severi</a> <a id="Shannon"></a>SHANNON, Claude Elwood <a class="mlink" data-popup="../../Biographies/Shannon/popup/" href="../../Biographies/Shannon/">Ⓑ</a> <a href="../Store/shannon.html" target="_blank">Ⓣ</a> Issued by Macedonia in 2016 <a href="../images/shannon.jpg" target="_blank">shannon</a> <a id="Sierpinski"></a>SIERPINSKI, Waclaw <a class="mlink" data-popup="../../Biographies/Sierpinski/popup/" href="../../Biographies/Sierpinski/">Ⓑ</a> <a href="../Store/sierpinski.html" target="_blank">Ⓣ</a> Issued by Poland in 1982, part of a series to celebrate the International Congress in Warsaw <a href="../images/sierpin.jpg" target="_blank">sierpin</a> <a id="Siguenza"></a>SIGUENZA, Carlos de <a class="mlink" data-popup="../../Biographies/Siguenza/popup/" href="../../Biographies/Siguenza/">Ⓑ</a> <a href="../Store/siguenza.html" target="_blank">Ⓣ</a> Issued by Mexico in 1973 <a href="../images/siguenza1.jpg" target="_blank">siguenza1</a> <a id="Silva">SILVA, Sebastião e </a><a class="mlink" data-popup="../../Biographies/Silva/popup/" href="../../Biographies/Silva/">Ⓑ</a> <a href="../Store/silva.html" target="_blank">Ⓣ</a> Issued by Portugal in 2004 <a href="../images/silva1.jpg" target="_blank">silva1</a> <a id="Skuhersky"></a>SKUHERSKÝ, Rudolf <a class="mlink" data-popup="../../Biographies/Skuhersky/popup/" href="../../Biographies/Skuhersky/">Ⓑ</a> <a href="../Store/skuhersky.html" target="_blank">Ⓣ</a> Issued by Czechoslovakia in 1957, one of a set published for the 250th anniversary of the Prague Engineering School <a href="../images/skuhersky.jpg" target="_blank">skuhersky</a> <a id="Somerville"></a>SOMERVILLE, Mary <a class="mlink" data-popup="../../Biographies/Somerville/popup/" href="../../Biographies/Somerville/">Ⓑ</a> <a href="../Store/somerville.html" target="_blank">Ⓣ</a> Issued by Great Britain in 2017 (Royal Bank of Scotland banknote) <a href="../images/somerville1.jpg" target="_blank">somerville1</a> <a id="Stefan_Josef"></a>STEFAN, Josef <a class="mlink" data-popup="../../Biographies/Stefan_Josef/popup/" href="../../Biographies/Stefan_Josef/">Ⓑ</a> <a href="../Store/stefan_josef.html" target="_blank">Ⓣ</a> Issued by Austria in 1985 <a href="../images/stefan_josef1.jpg" target="_blank">stefan_josef1</a> Issued by Slovenia in 1993 <a href="../images/stefan_josef2.jpg" target="_blank">stefan_josef2</a> <a id="Steklov"></a>STEKLOV, Vladimir Andreevich <a class="mlink" data-popup="../../Biographies/Steklov/popup/" href="../../Biographies/Steklov/">Ⓑ</a> <a href="../Store/steklov.html" target="_blank">Ⓣ</a> Issued by Ukraine in 2010 <a href="../images/steklov.jpg" target="_blank">steklov</a> Issued by Russia in 2014 <a href="../images/steklov2.jpg" target="_blank">steklov2</a> <a id="Stevin"></a>STEVIN, Simon <a class="mlink" data-popup="../../Biographies/Stevin/popup/" href="../../Biographies/Stevin/">Ⓑ</a> <a href="../Store/stevin.html" target="_blank">Ⓣ</a> Issued by Belgium in 1942, to benefit the battle against tuberculosis, part of a series 'Famous Flanders scientists of the 16th century' <a href="../images/stevin.jpg" target="_blank">stevin</a> <a id="Sultangazin"></a>SULTANGAZIN, Umirzak <a class="mlink" data-popup="../../Biographies/Sultangazin/popup/" href="../../Biographies/Sultangazin/">Ⓑ</a> <a href="../Store/sultangazin.html" target="_blank">Ⓣ</a> Issued by Kazakhstan in 2011 <a href="../images/sultangazin.jpg" target="_blank">sultangazin</a> <a id="Teixeira"></a>TEIXEIRA, Francisco Gomes <a class="mlink" data-popup="../../Biographies/Teixeira/popup/" href="../../Biographies/Teixeira/">Ⓑ</a> <a href="../Store/teixeira.html" target="_blank">Ⓣ</a> Issued by Portugal in 1951, on the centennial of his birth <a href="../images/gomes_teixeira1.jpg" target="_blank">gomes_teixeira1</a> <a href="../images/gomes_teixeira2.jpg" target="_blank">gomes_teixeira2</a> Issued by Portugal in 1980 <a href="../images/gomes_teixeira3.jpg" target="_blank">gomes_teixeira3</a> <a id="Terradas"></a>TERRADAS, Estaban <a class="mlink" data-popup="../../Biographies/Terradas/popup/" href="../../Biographies/Terradas/">Ⓑ</a> <a href="../Store/terradas.html" target="_blank">Ⓣ</a> Issued by Spain in 1985 <a href="../images/terradas1.jpg" target="_blank">terradas1</a> <a id="Thales"></a>THALES <a class="mlink" data-popup="../../Biographies/Thales/popup/" href="../../Biographies/Thales/">Ⓑ</a> <a href="../Store/thales.html" target="_blank">Ⓣ</a> Issued by Greece in 1994 <a href="../images/thales.jpg" target="_blank">thales</a> Issued by Mozambique in 2010 <a href="../images/thales2.jpg" target="_blank">thales2</a> Issued by Greece in 2017, one of a set of stamps, "Seven Sages of Ancient Greece" <a href="../images/thales3.jpg" target="_blank">thales3</a> <a id="Thomson"></a>THOMSON, James (Lord Kelvin) <a class="mlink" data-popup="../../Biographies/Thomson/popup/" href="../../Biographies/Thomson/">Ⓑ</a> <a href="../Store/thomson.html" target="_blank">Ⓣ</a> Issued by Guinea-Bissau in 1983 <a href="../images/thomson1.jpg" target="_blank">thomson1</a> Issued by Great Britain in 1996 (Clydesdale Bank banknote) <a href="../images/thomson4.jpg" target="_blank">thomson4</a> Issued by Serbia in 2007 <a href="../images/thomson2.jpg" target="_blank">thomson2</a> <a id="Timoshenko"></a>TIMOSHENKO, Stephen <a href="../Store/timoshenko.html" target="_blank">Ⓣ</a> Issued by Ukraine in 1998 <a href="../images/timoshenko1.jpg" target="_blank">timoshenko1</a> <a id="Tinbergen"></a>TINBERGEN, Jan <a class="mlink" data-popup="../../Biographies/Tinbergen/popup/" href="../../Biographies/Tinbergen/">Ⓑ</a> <a href="../Store/tinbergen.html" target="_blank">Ⓣ</a> Issued by Guinea-Bissau in 1977 <a href="../images/tinbergen2.jpg" target="_blank">tinbergen2</a> Issued by Netherlands in 1995 <a href="../images/tinbergen1.jpg" target="_blank">tinbergen1</a> Issued by Dominica in 2002 <a href="../images/tinbergen4.jpg" target="_blank">tinbergen4</a> <a id="Tinsley"></a>TINSLEY, Beatrice <a class="mlink" data-popup="../../Biographies/Tinsley/popup/" href="../../Biographies/Tinsley/">Ⓑ</a> <a href="../Store/tinsley.html" target="_blank">Ⓣ</a> Issued by New Zealand in 2019 <a href="../images/tinsley1.jpg" target="_blank">tinsley1</a> Issued by New Zealand in 2022 <a href="../images/tinsley2.jpg" target="_blank">tinsley2</a> <a id="Titeica"></a>TITEICA, Gheorghe <a class="mlink" data-popup="../../Biographies/Titeica/popup/" href="../../Biographies/Titeica/">Ⓑ</a> <a href="../Store/titeica.html" target="_blank">Ⓣ</a> Issued by Romania in 1961, part of a series to honour Romanian scientists <a href="../images/titeica.jpg" target="_blank">titeica</a> <a id="Torricelli"></a>TORRICELLI, Evangelista <a class="mlink" data-popup="../../Biographies/Torricelli/popup/" href="../../Biographies/Torricelli/">Ⓑ</a> <a href="../Store/torricelli.html" target="_blank">Ⓣ</a> Issued by Italy in 1958, to commemorate the 350th anniversary of the birth of Torricelli <a href="../images/torric.jpg" target="_blank">torric</a> Issued by Soviet Union in 1959, on the 350th anniversary of his birth <a href="../images/torric2.jpg" target="_blank">torric2</a> Issued by San Marino in 1983 <a href="../images/torric3.jpg" target="_blank">torric3</a> <a id="Turing"></a>TURING, Alan <a class="mlink" data-popup="../../Biographies/Turing/popup/" href="../../Biographies/Turing/">Ⓑ</a> <a href="../Store/turing.html" target="_blank">Ⓣ</a> Issued by Great Britain in 1999 <a href="../images/turing2.jpg" target="_blank">turing2</a> Issued by Portugal in 2000 <a href="../images/turing_von_neumann.jpg" target="_blank">turing_von_neumann</a> Issued by St Vincent in 2000 <a href="../images/turing1.jpg" target="_blank">turing1</a> Issued by St Helena in 2005 <a href="../images/turing4.jpg" target="_blank">turing4</a> Issued by Tatarstan in 2006 <a href="../images/turing3.jpg" target="_blank">turing3</a> Issued by Guinea in 2008 <a href="../images/turing5.jpg" target="_blank">turing5</a> <a href="../images/turing6.jpg" target="_blank">turing6</a> Issued by Great Britain in 2012 <a href="../images/turing7.jpg" target="_blank">turing7</a> Issued by Great Britain in 2020 (a banknote) <a href="../images/turing8.jpg" target="_blank">turing8</a> <a id="Ulugh_Beg"></a>ULUGH BEG <a class="mlink" data-popup="../../Biographies/Ulugh_Beg/popup/" href="../../Biographies/Ulugh_Beg/">Ⓑ</a> <a href="../Store/ulugh_beg.html" target="_blank">Ⓣ</a> Issued by Turkey in 1983 <a href="../images/ulugh5.jpg" target="_blank">ulugh5</a> Issued by Soviet Union in 1987, part of a series 'Important Persons' <a href="../images/ulugh.jpg" target="_blank">ulugh</a> Issued by Uzbekistan in 1994, on the 600th anniversary of his birth <a href="../images/ulugh2.jpg" target="_blank">ulugh2</a> <a href="../images/ulugh3.jpg" target="_blank">ulugh3</a> <a href="../images/ulugh4.jpg" target="_blank">ulugh4</a> Issued by Uzbekistan in 2009 <a href="../images/ulugh6.jpg" target="_blank">ulugh6</a> <a id="Vega"></a>VEGA, Jurij <a class="mlink" data-popup="../../Biographies/Vega/popup/" href="../../Biographies/Vega/">Ⓑ</a> <a href="../Store/vega.html" target="_blank">Ⓣ</a> Issued by Yugoslavia in 1954 <a href="../images/vega3.jpg" target="_blank">vega3</a> Issued by Slovenia in 1992 (a banknote) <a href="../images/vega1.jpg" target="_blank">vega1</a> Issued by Slovenia in 1994 <a href="../images/vega.jpg" target="_blank">vega</a> Issued by Slovenia in 2001, commemorating the centennial of the first Slovene technical high school, now known as Jurij Vega Grammar School in Idrija <a href="../images/vega5.jpg" target="_blank">vega5</a> Issued by Slovenia in 2004 (a coin) <a href="../images/vega6.jpg" target="_blank">vega6</a> Issued by Slovenia in 2005 <a href="../images/vega4.jpg" target="_blank">vega4</a> Issued by Serbia in 2024 <a href="../images/vega7.jpg" target="_blank">vega7</a> <a id="Verbiest"></a>VERBIEST, Ferdinand <a class="mlink" data-popup="../../Biographies/Verbiest/popup/" href="../../Biographies/Verbiest/">Ⓑ</a> <a href="../Store/verbiest.html" target="_blank">Ⓣ</a> Issued by Belgium in 1988 <a href="../images/verbiest1.jpg" target="_blank">verbiest1</a> Issued by Macau China in 1989 <a href="../images/verbiest2.jpg" target="_blank">verbiest2</a> <a id="Vidav"></a>VIDAV, Ivan <a class="mlink" data-popup="../../Biographies/Vidav/popup/" href="../../Biographies/Vidav/">Ⓑ</a> <a href="../Store/vidav.html" target="_blank">Ⓣ</a> Issued by Slovenia in 2018 <a href="../images/vidav.jpg" target="_blank">vidav</a> <a id="Von_Neumann"></a>VON NEUMANN, John <a class="mlink" data-popup="../../Biographies/Von_Neumann/popup/" href="../../Biographies/Von_Neumann/">Ⓑ</a> <a href="../Store/von_neumann.html" target="_blank">Ⓣ</a> Issued by Hungary in 1992 <a href="../images/neumann.jpg" target="_blank">neumann</a> Issued by Guyana in 1993 <a href="../images/von_neumann6.jpg" target="_blank">von_neumann6</a> Issued by Portugal in 2000 <a href="../images/turing_von_neumann.jpg" target="_blank">turing_von_neumann</a> Issued by Hungary in 2003, on the centennnial of his birth <a href="../images/neumann2.jpg" target="_blank">neumann2</a> Issued by USA in 2005 <a href="../images/neumann3.jpg" target="_blank">neumann3</a> Issued by Tatarstan in 2006 <a href="../images/neumann4.jpg" target="_blank">neumann4</a> <a id="Watt"></a>WATT, James <a href="../Store/watt.html" target="_blank">Ⓣ</a> Issued by Albania in 1986 <a href="../images/watt1.jpg" target="_blank">watt1</a> Issued by Mali in 1986 <a href="../images/watt10.jpg" target="_blank">watt10</a> Issued by Wallis and Futuna in 1986 <a href="../images/watt8.jpg" target="_blank">watt8</a> Issued by Grenada in 1987 <a href="../images/watt3.jpg" target="_blank">watt3</a> Issued by Grenada in 1987 <a href="../images/watt9.jpg" target="_blank">watt9</a> Issued by Antigua and Barbuda in 1993 <a href="../images/watt12.jpg" target="_blank">watt12</a> Issued by Cuba in 1996 <a href="../images/watt2.jpg" target="_blank">watt2</a> Issued by Maldives in 2000 <a href="../images/watt4.jpg" target="_blank">watt4</a> Issued by Sierra Leone in 2001 <a href="../images/watt5.jpg" target="_blank">watt5</a> Issued by Sao Tome and Principe in 2008 <a href="../images/watt6.jpg" target="_blank">watt6</a> Issued by Marshall Islands in 2012 <a href="../images/watt7.jpg" target="_blank">watt7</a> Issued by Mozambique in 2019 <a href="../images/watt11.jpg" target="_blank">watt11</a> Issued by Togo in 2019 <a href="../images/watt13.jpg" target="_blank">watt13</a> Issued by Great Britain in 2021 <a href="../images/watt14.jpg" target="_blank">watt14</a> <a id="Weber"></a>WEBER, Wilhelm <a class="mlink" data-popup="../../Biographies/Weber/popup/" href="../../Biographies/Weber/">Ⓑ</a> <a href="../Store/weber.html" target="_blank">Ⓣ</a> Issued by Germany in 2012, showing the "Göttingen seven" <a href="../images/weber1.jpg" target="_blank">weber1</a> <a id="Weil"></a>WEIL, Andrei <a class="mlink" data-popup="../../Biographies/Weil/popup/" href="../../Biographies/Weil/">Ⓑ</a> <a href="../Store/weil.html" target="_blank">Ⓣ</a> Issued by Guinea in 2008 <a href="../images/weil.jpg" target="_blank">weil</a> <a id="Wiener_Norbert"></a>WIENER, Norbert <a class="mlink" data-popup="../../Biographies/Wiener_Norbert/popup/" href="../../Biographies/Wiener_Norbert/">Ⓑ</a> <a href="../Store/wiener_norbert.html" target="_blank">Ⓣ</a> Issued by Israel in 1999, part of a series of stamps to honour the Jewish contribution to world culture in the modern era <a href="../images/wiener.jpg" target="_blank">wiener</a> Issued by Moldova in 2000 <a href="../images/wiener2.jpg" target="_blank">wiener2</a> Issued by Tatarstan in 2006 <a href="../images/wiener3.jpg" target="_blank">wiener3</a> <a id="Wigner"></a>WIGNER, Eugene <a class="mlink" data-popup="../../Biographies/Wigner/popup/" href="../../Biographies/Wigner/">Ⓑ</a> <a href="../Store/wigner.html" target="_blank">Ⓣ</a> Issued by Hungary in 1999 <a href="../images/wigner1.jpg" target="_blank">wigner1</a> <a id="Witten"></a>WITTEN, Edward <a class="mlink" data-popup="../../Biographies/Witten/popup/" href="../../Biographies/Witten/">Ⓑ</a> <a href="../Store/witten.html" target="_blank">Ⓣ</a> Issued by Guinea in 2010 <a href="../images/witten.jpg" target="_blank">witten</a> <a id="Wittgenstein"></a>WITTGENSTEIN, Ludwig <a class="mlink" data-popup="../../Biographies/Wittgenstein/popup/" href="../../Biographies/Wittgenstein/">Ⓑ</a> <a href="../Store/wittgenstein.html" target="_blank">Ⓣ</a> Issued by Austria in 1989, the hundredth anniversary of his birth <a href="../images/wittgenstein.jpg" target="_blank">wittgenstein</a> Issued by Portugal in 2000 <a href="../images/wittgenstein2.jpg" target="_blank">wittgenstein2</a> Issued by Belgium in 2001 <a href="../images/wittgenstein3.jpg" target="_blank">wittgenstein3</a> Issued by Austria in 2022 <a href="../images/wittgenstein4.jpg" target="_blank">wittgenstein4</a> <a id="Wren"></a>WREN, Christopher <a class="mlink" data-popup="../../Biographies/Wren/popup/" href="../../Biographies/Wren/">Ⓑ</a> <a href="../Store/wren.html" target="_blank">Ⓣ</a> Issued by Great Britain in 1981 (a banknote) <a href="../images/wren1.jpg" target="_blank">wren1</a> Issued by Great Britain in 2008 St Paul's <a href="../images/wren2.jpg" target="_blank">wren2</a> <a id="Wu_Wen-Tsun"></a>WU WEN-TSUN <a class="mlink" data-popup="../../Biographies/Wu_Wen-Tsun/popup/" href="../../Biographies/Wu_Wen-Tsun/">Ⓑ</a> <a href="../Store/wu_wen_tsun.html" target="_blank">Ⓣ</a> Issued by China in 2022 <a href="../images/wu_wentsun1.jpg" target="_blank">wu_wentsun1</a> <a id="Xiong_Qinglai"></a>XIONG QINGLAI <a class="mlink" data-popup="../../Biographies/Xiong_Qinglai/popup/" href="../../Biographies/Xiong_Qinglai/">Ⓑ</a> <a href="../Store/xiong_qinglai.html" target="_blank">Ⓣ</a> Issued by China in 1994 <a href="../images/xiong.jpg" target="_blank">xiong</a> <a id="Xu_Guangqi"></a>XU GUANGQI (Also known as Xu Guang-qi or Hsu Kuang-ch'i) <a class="mlink" data-popup="../../Biographies/Xu_Guangqi/popup/" href="../../Biographies/Xu_Guangqi/">Ⓑ</a> <a href="../Store/xu_guangqi.html" target="_blank">Ⓣ</a> Issued by Taiwan in 1964 <a href="../images/xuguangqi.jpg" target="_blank">xuguangqi</a> Issued by China in 1980 <a href="../images/xuguangqi2.jpg" target="_blank">xuguangqi2</a> Issued by Vatican City in 2009 <a href="../images/xu_guangqi4.jpg" target="_blank">xu_guangqi4</a> Issued by Guinea-Bissau in 2010 <a href="../images/xuguangqi3.jpg" target="_blank">xuguangqi3</a> <a id="Zadeh">ZADEH, Lütfi </a><a href="../Store/zadeh.html" target="_blank">Ⓣ</a> Issued by Azerbaijan in 2021 <a href="../images/zadeh1.jpg" target="_blank">zadeh1</a> <a id="Zaremba"></a>ZAREMBA, Stanislaw <a class="mlink" data-popup="../../Biographies/Zaremba/popup/" href="../../Biographies/Zaremba/">Ⓑ</a> <a href="../Store/zaremba.html" target="_blank">Ⓣ</a> Issued by Poland in 1982, part of a series to celebrate the International Congress in Warsaw <a href="../images/zaremba.jpg" target="_blank">zaremba</a> <a id="Zhang_Heng"></a>ZHANG HENG Also spelled Chang Heng <a class="mlink" data-popup="../../Biographies/Zhang_Heng/popup/" href="../../Biographies/Zhang_Heng/">Ⓑ</a> <a href="../Store/zhang_heng.html" target="_blank">Ⓣ</a> Issued by China in 1955 <a href="../images/zhang_heng.jpg" target="_blank">zhang_heng</a> Issued by Hong Kong China in 2015 <a href="../images/zhang_heng4.jpg" target="_blank">zhang_heng4</a> <a id="Zhautykov"></a>ZHAUTYKOV, Orymbek <a class="mlink" data-popup="../../Biographies/Zhautykov/popup/" href="../../Biographies/Zhautykov/">Ⓑ</a> <a href="../Store/zhautykov.html" target="_blank">Ⓣ</a> Issued by Kazakhstan in 2011 <a href="../images/zhautykov.jpg" target="_blank">zhautykov</a> <a id="Zhukovsky"></a>ZHUKOVSKY, Nicolai <a class="mlink" data-popup="../../Biographies/Zhukovsky/popup/" href="../../Biographies/Zhukovsky/">Ⓑ</a> <a href="../Store/zhukovsky.html" target="_blank">Ⓣ</a> Issued by Soviet Union in 1941 <a href="../images/zhukovsky4.jpg" target="_blank">zhukovsky4</a> <a href="../images/zhukovsky5.jpg" target="_blank">zhukovsky5</a> <a href="../images/zhukovsky6.jpg" target="_blank">zhukovsky6</a> Issued by Soviet Union in 1947 <a href="../images/zhukovsky2.jpg" target="_blank">zhukovsky2</a> <a href="../images/zhukovsky3.jpg" target="_blank">zhukovsky3</a> Issued by Soviet Union in 1963 <a href="../images/zhukovsky1.jpg" target="_blank">zhukovsky1</a> <a id="Zu_Chongzhi"></a>ZU CHONGZHI Also spelled Tsu Ch'ung-Chih or Hsu Kuang Chi. <a class="mlink" data-popup="../../Biographies/Zu_Chongzhi/popup/" href="../../Biographies/Zu_Chongzhi/">Ⓑ</a> <a href="../Store/zu_chongzhi.html" target="_blank">Ⓣ</a> Issued by China in 1955 <a href="../images/zu_chongzhi.jpg" target="_blank">zu_chongzhi</a> Issued by Guinea in 2009 <a href="../images/zu_chongzhi2.jpg" target="_blank">zu_chongzhi2</a> Issued by Hong Kong China in 2015 <a href="../images/zu_chongzhi4.jpg" target="_blank">zu_chongzhi4</a> <a id="Zuse"></a>ZUSE, Konrad <a class="mlink" data-popup="../../Biographies/Zuse/popup/" href="../../Biographies/Zuse/">Ⓑ</a> <a href="../Store/Zuse.html" target="_blank">Ⓣ</a> Issued by Guinea-Bissau in 2009 <a href="../images/zuse3.jpg" target="_blank">zuse3</a> Issued by Germany in 2010 <a href="../images/zuse1.jpg" target="_blank">zuse1</a> <a id="Zygalski"></a>ZYGALSKI, Henryk <a class="mlink" data-popup="../../Biographies/Zygalski/popup/" href="../../Biographies/Zygalski/">Ⓑ</a> <a href="../Store/zygalski.html" target="_blank">Ⓣ</a> Issued by Poland in 2009 <a href="../images/rozycki_rejewski_zygalski.jpg" target="_blank">rozycki_rejewski_zygalski</a> <a id="details"></a><hr style="border:1px solid;"/> <h2 align="center" style="color: rgb(165, 42, 42); font-family: Georgia;">Links to Other Sites</h2> <ul><li><a href="https://web.archive.org/web/20080201174638/http://www.oliver-faulhaber.de/briefmarken/mathematik/index.html">Motivsammlung Mathematic</a> </li><li><a href="https://web.archive.org/web/20091027000721/http://geocities.com/newtonstamp/" target="_blank">Isaac Newton on Postage Stamps</a> by David Stone </li><li><a href="https://web.archive.org/web/20060531072502/http://wwwhome.cs.utwente.nl/~jagersaa/" target="_blank">Home page of Bert Jager</a> </li><li><a href="https://web.archive.org/web/20100227012659/http://ublib.buffalo.edu/libraries/asl/exhibits/stamps/" target="_blank">A Selective History of Science on Stamps</a> </li><li><a href="https://web.archive.org/web/20110719102659/http://th.physik.uni-frankfurt.de/~jr/physstamps.html" target="_blank">Physicists on postage stamps</a> </li><li><a href="http://www2.physics.umd.edu/~redish/Money/">Physicists on currency</a> </li><li><a href="https://www.math.nyu.edu/~crorres/Archimedes/Stamps/stamps.html" target="_blank">The Stamps of Archimedes Page</a> </li><li><a href="http://www.boergens.de/manfred/marken/liste.htm" target="_blank">Mathematische Philatelic</a> in German </li><li><a href="https://web.archive.org/web/20060209124837/http://www.math.wfu.edu/~kuz/Stamps/stamppage.htm" target="_blank">Mathematical Stamp Collecting</a> </li><li><a href="http://www.uni-duisburg.de/FB11/WMY2000/BriefMarken.html" target="_blank">First-day covers with World Mathematical Year stamps</a> </li><li><a href="https://web.archive.org/web/20070621170145/http://www.schulmodell.de/mathe/briefmarken/briefmarken.htm" target="_blank">Mathematiker und mathematische Motive auf Briefmarken</a> </li><li><a href="http://www.mathematik-ist-schoen.jimdo.com/" target="_blank">Heinz Klaus Strick home page</a> </li><li><a href="http://www.phil-ouest.com/Series.php?Nom_serie=Mathematiques" target="_blank">French Mathematicians on Postage Stamps</a> </li><li><a href="https://personalpages.manchester.ac.uk/staff/hung.bui/Collection/Notes/banknotes.htm" target="_blank">Mathematicians and Scientists on Banknotes</a> </li></ul> <hr style="border:1px solid;"/> ABOUT THIS SITE: This page was created by <a href="mailto:jeff560@aol.com">Jeff Miller</a>, a recently-retired mathematics teacher at Gulf High School in New Port Richey, Florida. Extra stamps have been added from the collection of Heinz Klaus Strick. Miller also created these history of mathematics web pages: <a href="https://jeff560.tripod.com/mathsym.html">Earliest Uses of Various Mathematical Symbols</a> and <a href="https://jeff560.tripod.com/mathword.html">Earliest Known Uses of Some of the Words of Mathematics</a>. Thanks to the following people who assisted with this page: Toni Baeza, Manfred Börgens, Francis Boulot, Rachel Braun, Hung M Bui, Tim Carr, Krzysztof Ciesielski, Didier Cuidet, John W Dawson, Dieter Egelriede, Eli Eyal, Luis Filipe Faria, Oliver Faulhaber, Rudo Hajossy, Maike Den Houting, Bert Jagers, Vojtech Jankovic, Herbert Jarszick, Alain Juhel, Roland Klinger, Ivan Kosinar, Marcel Lajus, Gunnar Løvås, Roberto Lardelli, Gerald Leibowitz, Jean-Pierre Malmedy, Bernard Meyer, José Pablo Sánchez Mielgo, Markku Männikkö, Maiken Naylor, Joze Nemec, Guy Noel, John O'Connor, Jose Pablo, Arnaud Pascal, John G Peebles, Shannon L Ritter, Craig Smorynski, David Stone, Heinz Klaus Strick, Michael Tanoff, Alexander Tiunchick, Brigitte Vallee, Ioannis Varlamis, Gyorgy Visontay, Magnus Waller, David Wolfersberger and Shuki Zakai. <hr style="border:1px solid;"/> </main></div> </div> </div>   </div>  </main>  <footer class="site-footer mt-3 pb-3 pt-3 pt-md-0"> <div class="row"> <div class="cr-footer col-md-4"> DJF/JOC/EFR <a href="../../Miscellaneous/copyright/" >Copyright information</a > <a href="../../Miscellaneous/accessibility/" >Accessibility statement</a > </div> <div class="links-footer col-md-6"> <a href="https://www.st-andrews.ac.uk/mathematics-statistics/" target="_blank" >School of Mathematics and Statistics</a > <a href="http://www.st-andrews.ac.uk/" target="_blank" >University of St Andrews, Scotland</a > </div> <div class="col-md-2"> <img src="../../static/img/st-andrews-logo.png?h=e46f195e" alt="University of St. Andrews logo" /> </div> </div> <hr /> <div class="row"> <div class="col-md-12"> If you have comments, or spot errors, we are always pleased to <a href="../../Miscellaneous/contact_us/">hear from you</a>. </div> </div> </footer>  </div> <script src="../../static/js/popper.min.js?h=313789ca"></script> <script src="../../static/js/tippy-bundle.iife.min.js?h=99c14441"></script> <script src="../../static/js/site-popups.js?h=7ad47578"></script> <script src="../../static/js/foldup.js?h=0b5aeaab"></script> <script src="../../static/js/extras-popup.js?h=d0cee101"></script> <script src="../../static/js/imageMapResizer.min.js?h=319b7d80"></script> <script> imageMapResize(); // https://blog.shhdharmen.me/toggle-light-and-dark-themes-in-bootstrap const LOCAL_STORAGE_KEY = 'toggle-bootstrap-theme'; const LOCAL_META_DATA = JSON.parse( localStorage.getItem(LOCAL_STORAGE_KEY) ); const DARK_THEME_PATH = 'https://bootswatch.com/5/flatly/bootstrap.min.css'; const DARK_STYLE_LINK = document.getElementById('new-theme-style'); let isDark = LOCAL_META_DATA && LOCAL_META_DATA.isDark; // check if user has already selected dark theme earlier if (isDark) { enableDarkTheme(); } else { disableDarkTheme(); } /** * Apart from toggling themes, this will also store user's theme preference in local storage. * So when user visits next time, we can load the same theme. * */ function toggleTheme() { isDark = !isDark; if (isDark) { enableDarkTheme(); } else { disableDarkTheme(); } const META = { isDark }; localStorage.setItem(LOCAL_STORAGE_KEY, JSON.stringify(META)); } function enableDarkTheme() { DARK_STYLE_LINK.setAttribute('href', DARK_THEME_PATH); } function disableDarkTheme() { DARK_STYLE_LINK.setAttribute('href', ''); } </script> </body> </html>