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<meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class="">皆さま，</div><div class=""><br class=""></div><div class="">下記のセミナーの案内を再度させていただきます．</div><div class="">興味ある方は，振るってご参加ください．</div><div class=""><br class=""></div><div class="">なおセミナーの後，講演者を囲んで懇親会を開きたいと思います．</div><div class="">参加希望の方は，芥川の方まで今週中にご連絡ください．</div><div class="">講演者はとても元気な女性数学者です．</div><div class=""><br class=""></div><div class="">芥川和雄</div><div class=""><br class=""></div><br class=""><div><blockquote type="cite" class=""><div class="">
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<div class="">皆さま，</div>
<div class=""><br class="">
</div>
<div class="">下記の様に，中央大学 幾何・トポロジーセミナーを開催いたします．</div>
<div class="">興味のある方はご参加ください．</div>
<div class=""><br class="">
</div>
<div class="">芥川和雄</div>
<div class=""><p class="">########################################<br class="">
</p><p class="">日時：2023年3月30日(木)16:00~17:30</p><p class="">場所：中央大学理工学部6号館7階6707号室<br class="">
</p>
<div class="moz-forward-container">講師: Julie Rowlett (University
of Gothenburg, <span style="color: rgb(77, 81, 86); font-size:
14px; font-variant-ligatures: normal; background-color:
rgb(255, 255, 255); text-decoration-thickness: initial;" class="">Sweden)</span></div>
<div class="moz-forward-container"><span style="color: rgb(77, 81,
86); font-size: 14px; font-variant-ligatures: normal;
background-color: rgb(255, 255, 255);
text-decoration-thickness: initial;" class=""><br class="">
</span></div>
<div class="moz-forward-container">
<div style="font-size: 13px;" class="">Title<span class="gmail-Apple-converted-space"> </span>: The<span class="gmail-Apple-converted-space"> </span><span class="gmail-il">mathematics</span><span class="gmail-Apple-converted-space"> </span>of<span class="gmail-Apple-converted-space"> </span>``<span class="gmail-il">hearing</span><span style="background-color: rgb(255, 255, 204);" class=""></span><span class="gmail-Apple-converted-space"> </span>the<span class="gmail-Apple-converted-space"> </span><span class="gmail-il">shape</span><span class="gmail-Apple-converted-space"> </span>of<span class="gmail-Apple-converted-space"> </span>a<span class="gmail-Apple-converted-space"> </span><span class="gmail-il">drum</span>"</div>
<div style="font-size: 13px;" class=""><br class="">
</div>
<div style="font-size: 13px;" class="">Abstract : Have you heard<span class="gmail-Apple-converted-space"> </span>the<span class="gmail-Apple-converted-space"> </span>question, ``Can
one hear<span class="gmail-Apple-converted-space"> </span>the<span class="gmail-Apple-converted-space"> </span><span class="gmail-il">shape</span><span class="gmail-Apple-converted-space"> </span>of<span class="gmail-Apple-converted-space"> </span>a<span class="gmail-Apple-converted-space"> </span><span class="gmail-il">drum</span>?" Do you know<span class="gmail-Apple-converted-space"> </span>the<span class="gmail-Apple-converted-space"> </span>answer? <br class="">
</div>
<div style="font-size: 13px;" class="">In 1966, M. Kac's article<span class="gmail-Apple-converted-space"> </span>of<span class="gmail-Apple-converted-space"> </span>the<span class="gmail-Apple-converted-space"> </span>same<span class="gmail-Apple-converted-space"> </span>title popularized<span class="gmail-Apple-converted-space"> </span>the<span class="gmail-Apple-converted-space"> </span>inverse
isospectral problem for planar domains. <br class="">
</div>
<div style="font-size: 13px;" class="">Twenty six years later, Gordon,
Webb, and Wolpert demonstrated<span class="gmail-Apple-converted-space"> </span>the<span class="gmail-Apple-converted-space"> </span>answer, but many
naturally related problems remain open today. <br class="">
</div>
<div style="font-size: 13px;" class="">We will discuss results inspired
by ``<span class="gmail-il">hearing</span><span class="gmail-Apple-converted-space"> </span><span style="background-color: rgb(255, 255, 204);" class=""></span>the<span class="gmail-Apple-converted-space"> </span><span class="gmail-il">shape</span><span class="gmail-Apple-converted-space"> </span>of<span class="gmail-Apple-converted-space"> </span>a<span class="gmail-Apple-converted-space"> </span><span class="gmail-il">drum</span>'' which involve geometry,
mathematical physics, (microlocal) analysis, and number
theory. <br class="">
</div>
Along the way, we will visit several currently open problems.</div>
</div>
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</div>
<div class="">下記が web です．</div>
<br class="">
<a href="https://www.chuo-u.ac.jp/academics/faculties/science/departments/math/event/2023/01/64266/" class="moz-txt-link-freetext">https://www.chuo-u.ac.jp/academics/faculties/science/departments/math/event/2023/01/64266/</a><br class="">
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