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*Speaker:* Didier Lesesvre (Lille)<br>
*Date:* 27.11.2024<br>
*Time:* 15:00 - 16:00<br>
*Location:* Galatasaray Üniversitesi, Ortaköy, Çırağan Cd. No:36,
34349 Beşiktaş, H 306<br>
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<p><b>Title: </b>Packing spheres: piling up oranges... and very
modern mathematics</p>
<b>Abstract:</b> Sphere packing is an extremely old problem, yet
both widely applied in various domains and very challenging and
active mathematically. From inexpected applications to industry to
minimizing quadratic forms, from piling up oranges to the mysterious
Einstein hat that tiles the plane in an a-periodic way, from very
naive questions to the most modern maths (culminating with the
groundbreaking achievement of Maryna Viazovska in 2018 to determine
the optimal sphere packing in dimensions 8 and 24), I will present
some of the developments and ideas behind these questions. These
feature in particular beautifully rich mathematical objects: modular
forms, which are at the heart of the "modular magic" used by
Viazovska, allowing to make the proof of the sphere packing
surprisingly accessible.<br>
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* To access to the complete seminar calendar please visit this link<br>
<p><a class="moz-txt-link-freetext" href="https://matematik.gsu.edu.tr/tr/arastirma/seminerler">https://matematik.gsu.edu.tr/tr/arastirma/seminerler</a></p>
<p>* To add to your calendar use ical url.</p>
<p><a class="moz-txt-link-freetext" href="https://calendar.google.com/calendar/ical/mathseminar%40galatasaray.education/public/basic.ics">https://calendar.google.com/calendar/ical/mathseminar%40galatasaray.education/public/basic.ics</a></p>
* Participants from outside Galatasaray Üniversitesi are kindly<br>
requested to send an email to <a class="moz-txt-link-abbreviated" href="mailto:mathseminar@galatasaray.education">mathseminar@galatasaray.education</a><br>
before 13:00 on the day of the seminar.<br>
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Galatasaray Üniversitesi Matematik Bölümü<br>
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<a class="moz-txt-link-rfc2396E" href="https://matematik.gsu.edu.tr/"><https://matematik.gsu.edu.tr/></a><br>
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