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<!DOCTYPE html> <html dir='ltr'> <head> <link href='https://www.blogger.com/static/v1/widgets/55013136-widget_css_bundle.css' rel='stylesheet' type='text/css'/> <meta content='text/html; charset=UTF-8' http-equiv='Content-Type'/> <meta content='blogger' name='generator'/> <link href='http://recursed.blogspot.com/favicon.ico' rel='icon' type='image/x-icon'/> <link href='http://recursed.blogspot.com/2008/09/' rel='canonical'/> <link rel="alternate" type="application/atom+xml" title="Recursivity - Atom" href="http://recursed.blogspot.com/feeds/posts/default" /> <link rel="alternate" type="application/rss+xml" title="Recursivity - RSS" href="http://recursed.blogspot.com/feeds/posts/default?alt=rss" /> <link rel="service.post" type="application/atom+xml" title="Recursivity - Atom" href="https://www.blogger.com/feeds/20067416/posts/default" />  <meta content='http://recursed.blogspot.com/2008/09/' property='og:url'/> <meta content='Recursivity' property='og:title'/> <meta content='Recurrent thoughts about mathematics, science, politics, music, religion, and <br>Recurrent thoughts about mathematics, science, politics, music, religion, and <br>Recurrent thoughts about mathematics, science, politics, music, religion, and <br>Recurrent thoughts about ....' property='og:description'/> <title>Recursivity: September 2008</title> <style id='page-skin-1' type='text/css'></style> <link href='https://www.blogger.com/dyn-css/authorization.css?targetBlogID=20067416&zx=083dd33b-5ac8-4f9e-8b57-07394910cf00' media='none' onload='if(media!='all')media='all'' rel='stylesheet'/><noscript><link href='https://www.blogger.com/dyn-css/authorization.css?targetBlogID=20067416&zx=083dd33b-5ac8-4f9e-8b57-07394910cf00' rel='stylesheet'/></noscript> <meta name='google-adsense-platform-account' content='ca-host-pub-1556223355139109'/> <meta name='google-adsense-platform-domain' content='blogspot.com'/> </head> <body> <div class='navbar section' id='navbar'><div class='widget Navbar' data-version='1' id='Navbar1'><script type="text/javascript"> function setAttributeOnload(object, attribute, val) { if(window.addEventListener) { window.addEventListener('load', function(){ object[attribute] = val; 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script.type = 'text/javascript'; script.src = '//pagead2.googlesyndication.com/pagead/js/google_top_exp.js'; var head = document.getElementsByTagName('head')[0]; if (head) { head.appendChild(script); }})(); </script> </div></div> <div id='outer-wrapper'><div id='wrap2'>  <span id='skiplinks' style='display:none;'> <a href='#main'>skip to main </a> | <a href='#sidebar'>skip to sidebar</a> </span> <div id='header-wrapper'> <div class='header section' id='header'><div class='widget Header' data-version='1' id='Header1'> <div id='header-inner'> <div class='titlewrapper'> <h1 class='title'> <a href='http://recursed.blogspot.com/'> Recursivity </a> </h1> </div> <div class='descriptionwrapper'> <p class='description'><span>Recurrent thoughts about mathematics, science, politics, music, religion, and <br>Recurrent thoughts about mathematics, science, politics, music, religion, and <br>Recurrent thoughts about mathematics, science, politics, music, religion, and <br>Recurrent thoughts about ....</span></p> </div> </div> </div></div> </div> <div id='content-wrapper'> <div id='crosscol-wrapper' style='text-align:center'> <div class='crosscol no-items section' id='crosscol'></div> </div> <div id='main-wrapper'> <div class='main section' id='main'><div class='widget Blog' data-version='1' id='Blog1'> <div class='blog-posts hfeed'> <div class="date-outer"> <h2 class='date-header'><span>Thursday, September 25, 2008</span></h2> <div class="date-posts"> <div class='post-outer'> <div class='post hentry uncustomized-post-template' itemprop='blogPost' itemscope='itemscope' itemtype='http://schema.org/BlogPosting'> <meta content='20067416' itemprop='blogId'/> <meta content='5767334806307249225' itemprop='postId'/> <a name='5767334806307249225'></a> <h3 class='post-title entry-title' itemprop='name'> <a href='http://recursed.blogspot.com/2008/09/my-favorite-living-mathematician.html'>My Favorite Living Mathematician</a> </h3> <div class='post-header'> <div class='post-header-line-1'></div> </div> <div class='post-body entry-content' id='post-body-5767334806307249225' itemprop='description articleBody'> Ionica Smeets, of the Dutch website <a href="http://www.wiskundemeisjes.nl/">Wiskundemeisjes</a> (Math girls), recently asked me to name my favorite living mathematician. Her version of my answer, and some additional text, can be found (in Dutch) <a href="http://www.wiskundemeisjes.nl/20080925/de-favoriete-nog-levende-wiskundige-van26/">here</a>.<br /><br />Smeets also kindly allowed me to post my response here.<br /><br /><i>1. Who is your favorite still living mathematician?</i><br /><br />I have many favorites, and it's hard to choose: Alf van der Poorten, Carl Pomerance, Michel Mend猫s France, Donald Knuth, Adi Shamir, Manuel Blum, just to name a few. But if you force me to choose, I think I would have to say that my favorite is the Dutch mathematician Hendrik W. Lenstra, Jr.<br /><br /><i>2. Why do you admire him/her?</i><br /><br />I admire the beauty of his results and his talent for exposition. To list just two of his famous results:<br /><br /> - the Lenstra-Lenstra-Lov谩sz algorithm for lattice basis reduction, which led to a fast algorithm for factoring polynomials with integer coefficients, and has also given us new ways to attack cryptosystems<br /><br /> - the Lenstra elliptic curve factoring algorithm, which allows us to efficiently find small factors of very large numbers<br /><br /><i>3. What is special about his/her work?</i><br /><br />First, Hendrik Lenstra has a really deep understanding of algebra, so intimate that he can see almost instantly how to solve problems that would take others hours or days. <br /><br />Second, his exposition is always precise. Unlike some other top-flight mathematicians, who are often a little too casual in their proofs, Hendrik doesn't feel it is beneath his dignity to provide details. When you read one of his papers, you get the feeling that every sentence has been chosen with economy and clarity in mind. <br /><br />Third, Lenstra has a wide variety of interests, and doesn't hesitate to think seriously about things that others might dismiss as 'recreational'. I point in particular to his work on the <a href="http://www.ams.org/notices/200304/fea-escher.pdf">mathematics of the Dutch artist M. C. Escher</a> and his <a href="http://www.math.leidenuniv.nl/~hwl/papers/fibo.pdf">delightful paper on profinite Fibonacci numbers</a>.<br /><br /><i>4. Have you ever worked together?</i><br /><br />Yes, we wrote one paper together, "Continued fractions and linear recurrences", which appeared in the journal <i>Mathematics of Computation</i> in 1993. To explain what we did, I have to remind your readers about the two subjects of the title.<br /><br />Every real number has an essentially unique expansion as a continued fraction, that is, an expression of the form <i>x</i> = <i>a</i>+1/(<i>b</i>+1/(<i>c</i>+ ....)), where all the terms, except possibly the first, are positive integers. For example, π = 3+1/(7+1/(15+ 1/(1 + ...))). When you truncate a continued fraction after <i>n</i> terms, you get better and better rational approximations to the original number. For example, one term of the continued fraction for π gives 3, two terms gives 22/7, three terms gives 333/106, four terms gives 355/113, etc. These fractions are called the convergents and are usually written as <i>p</i><sub><i>n</i></sub> / <i>q</i><sub><i>n</i></sub> . <br /><br />Another thing your readers probably know about is linear recurrences. A simple example of a linear recurrence is the recurrence that gives the Fibonacci numbers: each term of the Fibonacci sequence is the sum of the two previous. When we generalize this to "each term is a linear combination of a fixed number of previous terms", we get the sequences defined by linear recurrences with constant coefficients. <br /><br />In our paper we combined these two ideas, and asked, "When are the sequences <i>p</i><sub><i>n</i></sub> and <i>q</i><sub><i>n</i></sub> linear recurrences?" The answer is not unexpected: this situation can occur if and only if the original number is the root of a quadratic equation, such as the square root of 2, or the golden ratio. However, the proof was unexpectedly hard, and we had to rely on a very deep theorem, the Hadamard quotient theorem of Alf van der Poorten. Later, Andrew Granville found a simpler argument that avoided the need for this difficult theorem.<br /><br /><i>5. What kind of person is he/she?</i><br /><br />Hendrik Lenstra is very much a picture of the traditional European intellectual: always impeccably dressed in a suit and tie, knowledgeable in many fields, and not afraid to show it, sometimes at the expense of those who know less. (I remember once him laughing at me because I did not know whether the root of a word was Latin or Greek.) But he is also extremely kind. Once, when I was hospitalized in the Netherlands following a talk in Leiden, he came to visit me each day in the hospital, bringing me excellent things to read, including <i>The Assault</i> by Dutch author Harry Mulisch. <br /><br />Hendrik exhibits a playful sense of humor and appreciates a good pun. It was he who once told me about the longest "square" in English: hotshots, which can be written as (hots)<sup>2</sup> . (The longest squares I know in Dutch are <i>tenten</i> and <i>kerker</i> .) I also remember him quipping that "Shakespeare's plays weren't written by Shakespeare, but by another man with the same name." (It gets more profound the more you think about it!) <br /><br />Hendrik is a collector of unusual and antiquarian books. He has a fondness for the Greek poet Homer. Knowing my interest in the crank mathematical literature, he once gave me a copy of the crackpot work <i>The Life-Romance of an Algebraist</i> by George Winslow Pierce, a book I still treasure in my personal collection. <br /><br /><br /><i>6. Is there a nice story you know about him/her?</i><br /><br />One of my nicest memories of time spent with Hendrik was our trip to watch the annular solar eclipse visible from southern Ontario on May 10, 1994. An annular eclipse occurs when the Moon comes between the Sun and the Earth, but is farther away than normal, so that all but a tiny outer ring of the Sun is covered. The sky took on a very unusual appearance, and you could see images of the sun in the diffraction patterns made by the leaves on the trees. <br /><br />Hendrik wrote a paper called "Mathematics and misunderstanding" which I have not been able to read, since it has appeared only in Dutch. But a reviewer of the paper summed up the argument as follows: "It is the author's contention that the true motivation for doing mathematical research is insight into one's own lack of understanding. The hallmark of the true researcher is his or her ability to recognize, in a seemingly wholly satisfactory theory, points which on closer inspection appear to be not fully understood and hence need further clarification."<br /><br />Hendrik does not like saying in a paper that something "must be true". He once wrote to me as follows:<br /><br /> "I am not as dogmatic about this as X, who used to ask me when I was a student: if something MUST be true, then IS it true? I think the answer is yes, but X apparently had a supernatural fear that if you FORCE something it may become recalcitrant and misbehave."<br /><br />For some other quotes of Hendrik Lenstra, see <a href="http://www.ucs.louisiana.edu/~avm1260/lenstra.html">here</a>. <div style='clear: both;'></div> </div> <div class='post-footer'> <div class='post-footer-line post-footer-line-1'> <span class='post-author vcard'> Posted by <span class='fn' itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <span itemprop='name'>Jeffrey Shallit</span> </span> </span> <span class='post-timestamp'> at <meta content='http://recursed.blogspot.com/2008/09/my-favorite-living-mathematician.html' itemprop='url'/> <a class='timestamp-link' href='http://recursed.blogspot.com/2008/09/my-favorite-living-mathematician.html' rel='bookmark' title='permanent link'><abbr class='published' itemprop='datePublished' title='2008-09-25T05:21:00-04:00'>5:21 AM</abbr></a> </span> <span class='post-comment-link'> <a class='comment-link' href='https://www.blogger.com/comment/fullpage/post/20067416/5767334806307249225' onclick=''> 3 comments: </a> </span> <span class='post-icons'> <span class='item-action'> <a href='https://www.blogger.com/email-post.g?blogID=20067416&postID=5767334806307249225' title='Email Post'> <img alt='' class='icon-action' height='13' src='https://resources.blogblog.com/img/icon18_email.gif' width='18'/> </a> </span> <span class='item-control blog-admin pid-579009720'> <a href='https://www.blogger.com/post-edit.g?blogID=20067416&postID=5767334806307249225&from=pencil' title='Edit Post'> <img alt='' class='icon-action' height='18' src='https://resources.blogblog.com/img/icon18_edit_allbkg.gif' width='18'/> </a> </span> </span> <div class='post-share-buttons goog-inline-block'> </div> </div> <div class='post-footer-line post-footer-line-2'> <span class='post-labels'> Labels: <a href='http://recursed.blogspot.com/search/label/mathematics' rel='tag'>mathematics</a> </span> </div> <div class='post-footer-line post-footer-line-3'> <span class='post-location'> </span> </div> </div> </div> </div> </div></div> <div class="date-outer"> <h2 class='date-header'><span>Wednesday, September 17, 2008</span></h2> <div class="date-posts"> <div class='post-outer'> <div class='post hentry uncustomized-post-template' itemprop='blogPost' itemscope='itemscope' itemtype='http://schema.org/BlogPosting'> <meta content='20067416' itemprop='blogId'/> <meta content='7941253204242638764' itemprop='postId'/> <a name='7941253204242638764'></a> <h3 class='post-title entry-title' itemprop='name'> <a href='http://recursed.blogspot.com/2008/09/i-wont-be-attending-graduation-at.html'>I Won't Be Attending Graduation at the University of Alberta Any Time Soon</a> </h3> <div class='post-header'> <div class='post-header-line-1'></div> </div> <div class='post-body entry-content' id='post-body-7941253204242638764' itemprop='description articleBody'> ...and <a href="http://www.centerforinquiry.net/ontario/news/theres_no_god_in_graduation_the_gateway_online_university_of_alberta/">here's why.</a><br /><br />A publicly-funded university shouldn't be instructing its students to do something "for the glory of God".<br /><br />You can <a href="mailto:uofapres@ualberta.ca">write the President of the University of Alberta</a>, Indira V. Samarasekera, to express your displeasure with her university's actions. <div style='clear: both;'></div> </div> <div class='post-footer'> <div class='post-footer-line post-footer-line-1'> <span class='post-author vcard'> Posted by <span class='fn' itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <span itemprop='name'>Jeffrey Shallit</span> </span> </span> <span class='post-timestamp'> at <meta content='http://recursed.blogspot.com/2008/09/i-wont-be-attending-graduation-at.html' itemprop='url'/> <a class='timestamp-link' href='http://recursed.blogspot.com/2008/09/i-wont-be-attending-graduation-at.html' rel='bookmark' title='permanent link'><abbr class='published' itemprop='datePublished' title='2008-09-17T12:58:00-04:00'>12:58 PM</abbr></a> </span> <span class='post-comment-link'> <a class='comment-link' href='https://www.blogger.com/comment/fullpage/post/20067416/7941253204242638764' onclick=''> 5 comments: </a> </span> <span class='post-icons'> <span class='item-action'> <a href='https://www.blogger.com/email-post.g?blogID=20067416&postID=7941253204242638764' title='Email Post'> <img alt='' class='icon-action' height='13' src='https://resources.blogblog.com/img/icon18_email.gif' width='18'/> </a> </span> <span class='item-control blog-admin pid-579009720'> <a href='https://www.blogger.com/post-edit.g?blogID=20067416&postID=7941253204242638764&from=pencil' title='Edit Post'> <img alt='' class='icon-action' height='18' src='https://resources.blogblog.com/img/icon18_edit_allbkg.gif' width='18'/> </a> </span> </span> <div class='post-share-buttons goog-inline-block'> </div> </div> <div class='post-footer-line post-footer-line-2'> <span class='post-labels'> Labels: <a href='http://recursed.blogspot.com/search/label/atheism' rel='tag'>atheism</a> </span> </div> <div class='post-footer-line post-footer-line-3'> <span class='post-location'> </span> </div> </div> </div> </div> <div class='post-outer'> <div class='post hentry uncustomized-post-template' itemprop='blogPost' itemscope='itemscope' itemtype='http://schema.org/BlogPosting'> <meta content='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEioL2hCiN-UbAYp0OLR8UC5RsBHAqtFrfgUueXup6Pp3yN-uSKSl5fAlyyuz2O421_pAhrVIM9BIWyybyWmkC119q2bqF_kB7M7bL0l6gPVuahQ9vXmiOwnPyu1vSC1cqKiAa9LdA/s400/weird-statue.jpg' itemprop='image_url'/> <meta content='20067416' itemprop='blogId'/> <meta content='875940627463731267' itemprop='postId'/> <a name='875940627463731267'></a> <h3 class='post-title entry-title' itemprop='name'> <a href='http://recursed.blogspot.com/2008/09/city-puzzle.html'>City Puzzle</a> </h3> <div class='post-header'> <div class='post-header-line-1'></div> </div> <div class='post-body entry-content' id='post-body-875940627463731267' itemprop='description articleBody'> <a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEioL2hCiN-UbAYp0OLR8UC5RsBHAqtFrfgUueXup6Pp3yN-uSKSl5fAlyyuz2O421_pAhrVIM9BIWyybyWmkC119q2bqF_kB7M7bL0l6gPVuahQ9vXmiOwnPyu1vSC1cqKiAa9LdA/s1600-h/weird-statue.jpg"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5247036390546849794" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEioL2hCiN-UbAYp0OLR8UC5RsBHAqtFrfgUueXup6Pp3yN-uSKSl5fAlyyuz2O421_pAhrVIM9BIWyybyWmkC119q2bqF_kB7M7bL0l6gPVuahQ9vXmiOwnPyu1vSC1cqKiAa9LdA/s400/weird-statue.jpg" style="display:block; margin:0px auto 10px; text-align:center;cursor:pointer; cursor:hand;" /></a><br />What country's current capital city has a name that can be cyclically shifted some number of letters to get the name of its former capital? <div style='clear: both;'></div> </div> <div class='post-footer'> <div class='post-footer-line post-footer-line-1'> <span class='post-author vcard'> Posted by <span class='fn' itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <span itemprop='name'>Jeffrey Shallit</span> </span> </span> <span class='post-timestamp'> at <meta content='http://recursed.blogspot.com/2008/09/city-puzzle.html' itemprop='url'/> <a class='timestamp-link' href='http://recursed.blogspot.com/2008/09/city-puzzle.html' rel='bookmark' title='permanent link'><abbr class='published' itemprop='datePublished' title='2008-09-17T12:58:00-04:00'>12:58 PM</abbr></a> </span> <span class='post-comment-link'> <a class='comment-link' href='https://www.blogger.com/comment/fullpage/post/20067416/875940627463731267' onclick=''> 4 comments: </a> </span> <span class='post-icons'> <span class='item-action'> <a href='https://www.blogger.com/email-post.g?blogID=20067416&postID=875940627463731267' title='Email Post'> <img alt='' class='icon-action' height='13' src='https://resources.blogblog.com/img/icon18_email.gif' width='18'/> </a> </span> <span class='item-control blog-admin pid-579009720'> <a href='https://www.blogger.com/post-edit.g?blogID=20067416&postID=875940627463731267&from=pencil' title='Edit Post'> <img alt='' class='icon-action' height='18' src='https://resources.blogblog.com/img/icon18_edit_allbkg.gif' width='18'/> </a> </span> </span> <div class='post-share-buttons goog-inline-block'> </div> </div> <div class='post-footer-line post-footer-line-2'> <span class='post-labels'> Labels: <a href='http://recursed.blogspot.com/search/label/puzzle' rel='tag'>puzzle</a> </span> </div> <div class='post-footer-line post-footer-line-3'> <span class='post-location'> </span> </div> </div> </div> </div> </div></div> <div class="date-outer"> <h2 class='date-header'><span>Wednesday, September 03, 2008</span></h2> <div class="date-posts"> <div class='post-outer'> <div class='post hentry uncustomized-post-template' itemprop='blogPost' itemscope='itemscope' itemtype='http://schema.org/BlogPosting'> <meta content='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEimIweVf6u09vrtMckyOpVLthIO4OAuYUeFpjOt7POu4X9MpnDCS-amX1XYPeaZA_pWHoxEtPxf9wwHvl3wcN-iID0klPyM3Rbe6fwmF9KTZASg30Ul4-9hRpRiDuH3UbZ8beD17A/s400/secondc.jpg' itemprop='image_url'/> <meta content='20067416' itemprop='blogId'/> <meta content='723961771344568154' itemprop='postId'/> <a name='723961771344568154'></a> <h3 class='post-title entry-title' itemprop='name'> <a href='http://recursed.blogspot.com/2008/09/my-new-book-is-out.html'>My New Book is Out!</a> </h3> <div class='post-header'> <div class='post-header-line-1'></div> </div> <div class='post-body entry-content' id='post-body-723961771344568154' itemprop='description articleBody'> My new book, <i>A Second Course in Formal Languages and Automata Theory</i>, is out!<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEimIweVf6u09vrtMckyOpVLthIO4OAuYUeFpjOt7POu4X9MpnDCS-amX1XYPeaZA_pWHoxEtPxf9wwHvl3wcN-iID0klPyM3Rbe6fwmF9KTZASg30Ul4-9hRpRiDuH3UbZ8beD17A/s1600-h/secondc.jpg"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5241661093947837458" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEimIweVf6u09vrtMckyOpVLthIO4OAuYUeFpjOt7POu4X9MpnDCS-amX1XYPeaZA_pWHoxEtPxf9wwHvl3wcN-iID0klPyM3Rbe6fwmF9KTZASg30Ul4-9hRpRiDuH3UbZ8beD17A/s400/secondc.jpg" style="display:block; margin:0px auto 10px; text-align:center;cursor:pointer; cursor:hand;" /></a><br /><br />Here's a <a href="http://www.cs.uwaterloo.ca/~shallit/second.html">web page</a> that tells you a little more about the book. And, if you absolutely have to have your own copy, you can buy it at <a href="http://www.amazon.com/Second-Course-Formal-Languages-Automata/dp/0521865727">Amazon</a> or <a href="http://search.barnesandnoble.com/booksearch/isbninquiry.asp?ean=0521865727">Barnes and Noble</a>. <div style='clear: both;'></div> </div> <div class='post-footer'> <div class='post-footer-line post-footer-line-1'> <span class='post-author vcard'> Posted by <span class='fn' itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <span itemprop='name'>Jeffrey Shallit</span> </span> </span> <span class='post-timestamp'> at <meta content='http://recursed.blogspot.com/2008/09/my-new-book-is-out.html' itemprop='url'/> <a class='timestamp-link' href='http://recursed.blogspot.com/2008/09/my-new-book-is-out.html' rel='bookmark' title='permanent link'><abbr class='published' itemprop='datePublished' title='2008-09-03T01:20:00-04:00'>1:20 AM</abbr></a> </span> <span class='post-comment-link'> <a class='comment-link' href='https://www.blogger.com/comment/fullpage/post/20067416/723961771344568154' onclick=''> 15 comments: </a> </span> <span class='post-icons'> <span class='item-action'> <a href='https://www.blogger.com/email-post.g?blogID=20067416&postID=723961771344568154' title='Email Post'> <img alt='' class='icon-action' height='13' src='https://resources.blogblog.com/img/icon18_email.gif' width='18'/> </a> </span> <span class='item-control blog-admin pid-579009720'> <a href='https://www.blogger.com/post-edit.g?blogID=20067416&postID=723961771344568154&from=pencil' title='Edit Post'> <img alt='' class='icon-action' height='18' src='https://resources.blogblog.com/img/icon18_edit_allbkg.gif' width='18'/> </a> </span> </span> <div class='post-share-buttons goog-inline-block'> </div> </div> <div class='post-footer-line post-footer-line-2'> <span class='post-labels'> Labels: <a href='http://recursed.blogspot.com/search/label/computer%20science' rel='tag'>computer science</a>, <a href='http://recursed.blogspot.com/search/label/mathematics' rel='tag'>mathematics</a> </span> </div> <div class='post-footer-line post-footer-line-3'> <span class='post-location'> </span> </div> </div> </div> </div> </div></div> </div> <div class='blog-pager' id='blog-pager'> <span id='blog-pager-newer-link'> <a class='blog-pager-newer-link' href='http://recursed.blogspot.com/search?updated-max=2009-11-16T07:00:00-05:00&max-results=100&reverse-paginate=true' id='Blog1_blog-pager-newer-link' title='Newer Posts'>Newer Posts</a> </span> <span id='blog-pager-older-link'> <a class='blog-pager-older-link' href='http://recursed.blogspot.com/search?updated-max=2008-09-03T01:20:00-04:00' id='Blog1_blog-pager-older-link' title='Older Posts'>Older Posts</a> </span> <a class='home-link' href='http://recursed.blogspot.com/'>Home</a> </div> <div class='clear'></div> <div class='blog-feeds'> <div class='feed-links'> Subscribe to: <a class='feed-link' href='http://recursed.blogspot.com/feeds/posts/default' target='_blank' type='application/atom+xml'>Posts (Atom)</a> </div> </div> </div></div> </div> <div id='sidebar-wrapper'> <div class='sidebar section' id='sidebar'><div class='widget Image' data-version='1' id='Image1'> <h2>-</h2> <div class='widget-content'> <img alt='-' height='227' id='Image1_img' src='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEio37WuIFScFiF-SVXAe3OdqTu1s2jfLoJAcrgz5szwlqKND83BLy_Re7IgcuvRoRboz_dZKeaFUMxuSRAFBN1KnBgLhyNHg20-o7BqtHfFNBflQbrjxGeATth7SACfnfP61inGBQ/s227/jeff-math.jpg' width='226'/> <br/> <span class='caption'>Jeffrey Shallit</span> </div> <div class='clear'></div> </div><div class='widget Text' data-version='1' id='Text1'> <div class='widget-content'> American mathematician, professor of computer science at a major Canadian university, & skeptic. <div><br /></div><div>All comments are moderated to remove spam and duplication. 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class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2017/11/'> November </a> <span class='post-count' dir='ltr'>(1)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2017/10/'> October </a> <span class='post-count' dir='ltr'>(2)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2017/09/'> September </a> <span class='post-count' dir='ltr'>(5)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2017/08/'> August </a> <span class='post-count' dir='ltr'>(4)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2017/07/'> July </a> <span class='post-count' dir='ltr'>(3)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2017/05/'> May </a> <span class='post-count' dir='ltr'>(1)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2017/04/'> April </a> <span class='post-count' dir='ltr'>(1)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2017/03/'> March </a> <span class='post-count' dir='ltr'>(2)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2017/01/'> January </a> <span class='post-count' dir='ltr'>(1)</span> </li> </ul> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2016/'> 2016 </a> <span class='post-count' dir='ltr'>(54)</span> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2016/11/'> November </a> <span class='post-count' dir='ltr'>(3)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2016/10/'> October </a> <span class='post-count' dir='ltr'>(3)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2016/09/'> September </a> <span class='post-count' dir='ltr'>(12)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2016/07/'> July </a> <span class='post-count' dir='ltr'>(4)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2016/06/'> June </a> <span class='post-count' dir='ltr'>(2)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2016/05/'> May </a> <span class='post-count' dir='ltr'>(6)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2016/04/'> April </a> <span class='post-count' dir='ltr'>(11)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2016/03/'> March </a> <span class='post-count' dir='ltr'>(4)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2016/02/'> February </a> <span class='post-count' dir='ltr'>(6)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2016/01/'> January </a> <span class='post-count' dir='ltr'>(3)</span> </li> </ul> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2015/'> 2015 </a> <span class='post-count' dir='ltr'>(69)</span> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2015/12/'> December </a> <span class='post-count' dir='ltr'>(9)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2015/11/'> November </a> <span class='post-count' dir='ltr'>(6)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2015/10/'> October </a> <span class='post-count' dir='ltr'>(3)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2015/09/'> September </a> <span class='post-count' dir='ltr'>(9)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2015/08/'> August </a> <span class='post-count' dir='ltr'>(8)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2015/07/'> July </a> <span class='post-count' dir='ltr'>(4)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2015/06/'> June </a> <span class='post-count' dir='ltr'>(7)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2015/05/'> May </a> <span class='post-count' dir='ltr'>(1)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2015/04/'> April </a> <span class='post-count' dir='ltr'>(1)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2015/03/'> March </a> <span class='post-count' dir='ltr'>(8)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2015/02/'> February </a> <span class='post-count' dir='ltr'>(4)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2015/01/'> January </a> <span class='post-count' dir='ltr'>(9)</span> </li> </ul> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2014/'> 2014 </a> <span class='post-count' dir='ltr'>(76)</span> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2014/12/'> December </a> <span class='post-count' dir='ltr'>(4)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2014/11/'> November </a> <span class='post-count' dir='ltr'>(8)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2014/10/'> October </a> <span class='post-count' dir='ltr'>(3)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2014/09/'> September </a> <span class='post-count' dir='ltr'>(11)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2014/08/'> August </a> <span class='post-count' dir='ltr'>(9)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2014/07/'> July </a> <span class='post-count' dir='ltr'>(7)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2014/06/'> June </a> <span class='post-count' dir='ltr'>(4)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2014/05/'> May </a> <span class='post-count' dir='ltr'>(4)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2014/04/'> April </a> <span class='post-count' dir='ltr'>(2)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2014/03/'> March </a> <span class='post-count' dir='ltr'>(7)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2014/02/'> February </a> <span class='post-count' dir='ltr'>(7)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2014/01/'> January </a> <span class='post-count' dir='ltr'>(10)</span> </li> </ul> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2013/'> 2013 </a> <span class='post-count' dir='ltr'>(127)</span> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2013/12/'> December </a> <span class='post-count' dir='ltr'>(9)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2013/11/'> November </a> <span class='post-count' dir='ltr'>(8)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2013/10/'> October </a> <span class='post-count' dir='ltr'>(8)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2013/09/'> September </a> <span class='post-count' dir='ltr'>(6)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2013/08/'> August </a> <span class='post-count' dir='ltr'>(6)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2013/07/'> July </a> <span class='post-count' dir='ltr'>(5)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2013/06/'> June </a> <span class='post-count' dir='ltr'>(8)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2013/05/'> May </a> <span class='post-count' dir='ltr'>(14)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2013/04/'> April </a> <span class='post-count' dir='ltr'>(12)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2013/03/'> March </a> <span class='post-count' dir='ltr'>(19)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2013/02/'> February </a> <span class='post-count' dir='ltr'>(14)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2013/01/'> January </a> <span class='post-count' dir='ltr'>(18)</span> </li> </ul> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2012/'> 2012 </a> <span class='post-count' dir='ltr'>(133)</span> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2012/12/'> December </a> <span class='post-count' dir='ltr'>(13)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2012/11/'> November </a> <span class='post-count' dir='ltr'>(11)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2012/10/'> October </a> <span class='post-count' dir='ltr'>(20)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2012/09/'> September </a> <span class='post-count' dir='ltr'>(8)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2012/08/'> August </a> <span class='post-count' dir='ltr'>(14)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2012/07/'> July </a> <span class='post-count' dir='ltr'>(5)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2012/06/'> June </a> <span class='post-count' dir='ltr'>(6)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2012/05/'> May </a> <span class='post-count' dir='ltr'>(14)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2012/04/'> April </a> <span class='post-count' dir='ltr'>(14)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2012/03/'> March </a> <span class='post-count' dir='ltr'>(12)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2012/02/'> February </a> <span class='post-count' dir='ltr'>(4)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2012/01/'> January </a> <span class='post-count' dir='ltr'>(12)</span> </li> </ul> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2011/'> 2011 </a> <span class='post-count' dir='ltr'>(96)</span> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2011/12/'> December </a> <span class='post-count' dir='ltr'>(14)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2011/11/'> November </a> <span class='post-count' dir='ltr'>(12)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2011/10/'> October </a> <span class='post-count' dir='ltr'>(1)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2011/09/'> September </a> <span class='post-count' dir='ltr'>(7)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2011/08/'> August </a> <span class='post-count' dir='ltr'>(6)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2011/07/'> July </a> <span class='post-count' dir='ltr'>(8)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2011/06/'> June </a> <span class='post-count' dir='ltr'>(9)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2011/05/'> May </a> <span class='post-count' dir='ltr'>(4)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2011/04/'> April </a> <span class='post-count' dir='ltr'>(9)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2011/03/'> March </a> <span class='post-count' dir='ltr'>(6)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2011/02/'> February </a> <span class='post-count' dir='ltr'>(11)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2011/01/'> January </a> <span class='post-count' dir='ltr'>(9)</span> </li> </ul> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2010/'> 2010 </a> <span class='post-count' dir='ltr'>(133)</span> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2010/12/'> December </a> <span class='post-count' dir='ltr'>(10)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2010/11/'> November </a> <span class='post-count' dir='ltr'>(7)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2010/10/'> October </a> <span class='post-count' dir='ltr'>(8)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2010/09/'> September </a> <span class='post-count' dir='ltr'>(7)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2010/08/'> August </a> <span class='post-count' dir='ltr'>(9)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2010/07/'> July </a> <span class='post-count' dir='ltr'>(3)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2010/06/'> June </a> <span class='post-count' dir='ltr'>(12)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2010/05/'> May </a> <span class='post-count' dir='ltr'>(12)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2010/04/'> April </a> <span class='post-count' dir='ltr'>(9)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2010/03/'> March </a> <span class='post-count' dir='ltr'>(18)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2010/02/'> February </a> <span class='post-count' dir='ltr'>(18)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2010/01/'> January </a> <span class='post-count' dir='ltr'>(20)</span> </li> </ul> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2009/'> 2009 </a> <span class='post-count' dir='ltr'>(116)</span> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2009/12/'> December </a> <span class='post-count' dir='ltr'>(14)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2009/11/'> November </a> <span class='post-count' dir='ltr'>(25)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2009/10/'> October </a> <span class='post-count' dir='ltr'>(16)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2009/09/'> September </a> <span class='post-count' dir='ltr'>(6)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2009/08/'> August </a> <span class='post-count' dir='ltr'>(5)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2009/07/'> July </a> <span class='post-count' dir='ltr'>(14)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2009/06/'> June </a> <span class='post-count' dir='ltr'>(5)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2009/05/'> May </a> <span class='post-count' dir='ltr'>(9)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2009/04/'> April </a> <span class='post-count' dir='ltr'>(2)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2009/03/'> March </a> <span class='post-count' dir='ltr'>(5)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2009/02/'> February </a> <span class='post-count' dir='ltr'>(9)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2009/01/'> January </a> <span class='post-count' dir='ltr'>(6)</span> </li> </ul> </li> </ul> <ul class='hierarchy'> <li class='archivedate expanded'> <a class='toggle' href='javascript:void(0)'> <span class='zippy toggle-open'> ▼  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2008/'> 2008 </a> <span class='post-count' dir='ltr'>(102)</span> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2008/12/'> December </a> <span class='post-count' dir='ltr'>(6)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2008/11/'> November </a> <span class='post-count' dir='ltr'>(7)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2008/10/'> October </a> <span class='post-count' dir='ltr'>(4)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate expanded'> <a class='toggle' href='javascript:void(0)'> <span class='zippy toggle-open'> ▼  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2008/09/'> September </a> <span class='post-count' dir='ltr'>(4)</span> <ul class='posts'> <li><a href='http://recursed.blogspot.com/2008/09/my-favorite-living-mathematician.html'>My Favorite Living Mathematician</a></li> <li><a href='http://recursed.blogspot.com/2008/09/i-wont-be-attending-graduation-at.html'>I Won't Be Attending Graduation at the University ...</a></li> <li><a href='http://recursed.blogspot.com/2008/09/city-puzzle.html'>City Puzzle</a></li> <li><a href='http://recursed.blogspot.com/2008/09/my-new-book-is-out.html'>My New Book is Out!</a></li> </ul> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2008/08/'> August </a> <span class='post-count' dir='ltr'>(6)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2008/07/'> July </a> <span class='post-count' dir='ltr'>(13)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2008/06/'> June </a> <span class='post-count' dir='ltr'>(10)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2008/05/'> May </a> <span class='post-count' dir='ltr'>(13)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2008/04/'> April </a> <span class='post-count' dir='ltr'>(13)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2008/03/'> March </a> <span class='post-count' dir='ltr'>(14)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2008/02/'> February </a> <span class='post-count' dir='ltr'>(4)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2008/01/'> January </a> <span class='post-count' dir='ltr'>(8)</span> </li> </ul> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2007/'> 2007 </a> <span class='post-count' dir='ltr'>(78)</span> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2007/12/'> December </a> <span class='post-count' dir='ltr'>(4)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2007/11/'> November </a> <span class='post-count' dir='ltr'>(2)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2007/10/'> October </a> <span class='post-count' dir='ltr'>(6)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2007/09/'> September </a> <span class='post-count' dir='ltr'>(22)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2007/08/'> August </a> <span class='post-count' dir='ltr'>(9)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2007/07/'> July </a> <span class='post-count' dir='ltr'>(10)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2007/06/'> June </a> <span class='post-count' dir='ltr'>(8)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2007/05/'> May </a> <span class='post-count' dir='ltr'>(4)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2007/04/'> April </a> <span class='post-count' dir='ltr'>(5)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2007/03/'> March </a> <span class='post-count' dir='ltr'>(2)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2007/02/'> February </a> <span class='post-count' dir='ltr'>(3)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2007/01/'> January </a> <span class='post-count' dir='ltr'>(3)</span> </li> </ul> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2006/'> 2006 </a> <span class='post-count' dir='ltr'>(65)</span> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2006/12/'> December </a> <span class='post-count' dir='ltr'>(5)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2006/11/'> November </a> <span class='post-count' dir='ltr'>(5)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2006/09/'> September </a> <span class='post-count' dir='ltr'>(4)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2006/08/'> August </a> <span class='post-count' dir='ltr'>(3)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2006/07/'> July </a> <span class='post-count' dir='ltr'>(5)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2006/06/'> June </a> <span class='post-count' dir='ltr'>(1)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2006/05/'> May </a> <span class='post-count' dir='ltr'>(5)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2006/04/'> April </a> <span class='post-count' dir='ltr'>(6)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2006/03/'> March </a> <span class='post-count' dir='ltr'>(6)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2006/02/'> February </a> <span class='post-count' dir='ltr'>(13)</span> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2006/01/'> January </a> <span class='post-count' dir='ltr'>(12)</span> </li> </ul> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2005/'> 2005 </a> <span class='post-count' dir='ltr'>(14)</span> <ul class='hierarchy'> <li class='archivedate collapsed'> <a class='toggle' href='javascript:void(0)'> <span class='zippy'> ►  </span> </a> <a class='post-count-link' href='http://recursed.blogspot.com/2005/12/'> December </a> <span class='post-count' dir='ltr'>(14)</span> </li> </ul> </li> </ul> </div> </div> <div class='clear'></div> </div> </div><div class='widget LinkList' data-version='1' id='LinkList1'> <h2>Other Blogs to Visit</h2> <div class='widget-content'> <ul> <li><a href='http://scienceblogs.com/dispatches/'>Dispatches from the Culture Wars</a></li> <li><a href='http://www.scienceblogs.com/evolutionblog/'>Jason Rosenhouse's Evolutionblog</a></li> <li><a href='http://lippard.blogspot.com/'>Jim Lippard's Blog</a></li> <li><a href='http://www.scienceblogs.com/pharyngula'>Pharyngula</a></li> <li><a href='http://www.scottaaronson.com/blog/'>Shtetl-Optimized</a></li> <li><a href='http://www.talkreason.org/'>Talk Reason</a></li> <li><a href='http://www.pandasthumb.org/'>The Panda's Thumb</a></li> </ul> <div class='clear'></div> </div> </div> </div> </div>  <div class='clear'> </div> </div>  </div></div>  <script type="text/javascript" src="https://www.blogger.com/static/v1/widgets/984859869-widgets.js"></script> <script type='text/javascript'> window['__wavt'] = 'AOuZoY7sh_xO1z9LJ-gnPkpTzBueB_dcXw:1733077822089';_WidgetManager._Init('//www.blogger.com/rearrange?blogID\x3d20067416','//recursed.blogspot.com/2008/09/','20067416'); _WidgetManager._SetDataContext([{'name': 'blog', 'data': {'blogId': '20067416', 'title': 'Recursivity', 'url': 'http://recursed.blogspot.com/2008/09/', 'canonicalUrl': 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