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<p>皆さま，</p>
<p>下記のように中央大・幾何トポロジーセミナーを対面で行います．</p>
<p>ご参加をお待ちしています．</p>
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<p>場所：中央大学・後楽園キャンパス 6号館 12階 61202号室</p>
<p>日時：7月1日（金）17：00～18：00</p>
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<p>講演者：Jeff Viaclovsky (Department of Mathematics, University of
California, Irvine) <span style="color: rgb(0, 0, 0);
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<div class="moz-forward-container">タイトル: Gravitational instantons,
rational surfaces, and K3 surfaces<br>
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講演要旨: I will describe some examples of complete non-compact
Ricci-flat metrics in dimension 4, which are called "gravitational
instantons.</div>
<div class="moz-forward-container">" In many cases, these can be
compactified complex analytically to rational surfaces. <br>
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I will also discuss how these gravitational instantons can arise
from sequences of degenerating Ricci-flat metrics on the compact K3
surface, through a process called "bubbling".<br>
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<p>芥川和雄<br>
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