Professor Étienne Ghys Unveils the Intricacies of Soccer Ball Design

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href="javascript:;" class="active"> News and media </a> <span></span> <a href="/en/news-and-media/news">News</a> <span></span> <a href="javascript:;" class="active"> Professor Étienne Ghys Unveils the Intricacies of Soccer Ball Design </a> </div> </div> </div> </nav> </div> </div> </div> </aside> </div> <div id="main-wrapper" class="layout-main-wrapper clearfix"> <div id="block-cityu-subtheme-2019-content" data-block-plugin-id="system_main_block" class="block block-system block-system-main-block"> <div class="content"> <article class="news-details"> <div class="container"> <div class="new-categories"></div> <div class="news-title"> <div class="field field--name-title field--type-string field--label-hidden field__items"> <h1>Professor Étienne Ghys Unveils the Intricacies of Soccer Ball Design</h1></div></div> <div class="new-date"> <span class="date-en">01 Nov 2024</span> <span class="date-zhant">2024年11月1日</span> <span class="date-zhans">2024年11月1日</span> <div class="row share-block"> 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window.location;" title="Email a friend"><img alt="mail" src="/sites/g/files/asqsls8091/files/2024-04/email.png" /></p> </div> <div class="share-icon"> <p onclick="myFunction()"><img alt="alt img" src="/sites/g/files/asqsls8091/files/2024-04/link.png" /></p> </div> <p><input hidden="" id="myInputShare" type="text" value="https://hkias01.wcm.cityu.edu.hk/" /></p> <script> function myFunction() { /* Get the text field */ var copyText = document.getElementById("myInputShare"); /* Select the text field */ copyText.select(); copyText.setSelectionRange(0, 99999); /* For mobile devices */ /* Copy the text inside the text field */ navigator.clipboard.writeText(window.location.href); /* Alert the copied text */ alert("Copied : " + window.location.href); } function myfunction() { var i = window.location.href; return i; } </script> </div> <div class="inner-left-sidebar-section"> <div class="news-content"> <div class="clearfix text-formatted field field--name-body field--type-text-with-summary field--label-hidden field__item"><figure role="group" class="caption caption-img"> <img alt="Professor Étienne Ghys, Permanent Secretary of the French Academy of Sciences and Emeritus Research Director at CNRS" data-entity-type="file" data-entity-uuid="2fba511e-5718-42c0-b37a-8b7419df479c" src="/sites/g/files/asqsls8091/files/inline-images/WWK_0304_1.JPG" width="8256" height="5504" loading="lazy"> <figcaption>Professor Étienne Ghys, Permanent Secretary of the French Academy of Sciences and Emeritus Research Director at CNRS</figcaption> </figure> <p><strong><a name="_Hlk181281859">Professor </a><a name="_Hlk180671871">Étienne</a> Ghys</strong>, <a name="_Hlk181287028">Permanent Secretary of the French Academy of Sciences and Emeritus Research Director </a>at the French National Centre for Scientific Research (CNRS), delivered a thought-provoking <strong>HKIAS Distinguished Lecture</strong> on <strong>"Soccer Balls: Their History, Geometries, and Aerodynamics"</strong> on 30 October 2024 at City University of Hong Kong. The event, facilitated by <strong>Professor <a name="_Hlk180676716">Neil Chada</a></strong> from the Department of Mathematics, attracted <a name="_Hlk181260720">a diverse audience of academics and students</a>. Notably, <a name="_Hlk181283101"></a><a name="_Hlk181287769"><strong>Ms Camélia Aissat</strong>, Deputy Consul of Education and Culture and <strong>Mr Louis Doucet</strong>, Head of Press and Communication from the Consulate General of France in Hong Kong & Macau</a>, also showed keen interest and attended the lecture.<br> <br> In this lecture, Professor Ghys explored the intricate design and physics of soccer balls, tracing innovations from World Cup designs. He examined how these designs achieve near-perfect spherical shapes and explored the reasons for their varying flight paths, highlighting the "drag crisis phenomenon" well-known in fluid dynamics.<br> <br> Professor Étienne Ghys is a renowned mathematician known for his contributions to geometry and chaos theory. Since 2019, he has served as the Permanent Secretary of the French Academy of Sciences. As Emeritus Research Director at CNRS, he helped establish the mathematics laboratory at the École Normale Supérieure de Lyon. Committed to making mathematics accessible, he has produced educational materials and created "Images des mathématiques," an online platform with over ten million views. Recognized with awards such as the CNRS Silver Medal and the Clay Award for Dissemination of Mathematical Knowledge, Professor Ghys is dedicated to inspiring a broad audience with the joy of mathematics.<br> <br> This lecture is supported in part by the Kwang Hua Educational Foundation.<br> <br> More information about the lecture, please click <a href="https://www.hkias.cityu.edu.hk/en/events/past-events/hkias-distinguished-lecture-series-soccer-balls-their-history-geometries-and">here</a>.</p> <figure role="group" class="caption caption-img"> <img alt="(From left) Professor Yang Ren, Head of Department of Physics; Professor Étienne Ghys; Professor Phillippe Ciarlet, HKIAS Senior Fellow; Professor Ya Yan Lu, Head of Department of Mathematics; Ms Camélia Aissat, Deputy Consul of Education and Culture, Consulate General of France in Hong Kong & Macau; Professor Neil Chada, Assistant Professor of Department of Mathematics; and Mrs Martine Ghys" data-entity-type="file" 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