<div dir="ltr">Dear list members,<br><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><br>You are most cordially invited to the <span><span><span><span><span>"Yeditepe Mathematics 25th Year Seminar</span></span></span></span></span>s" organized by the Department of Mathematics at Yeditepe University. The details of this week's talk are as follows:</div><div dir="ltr"><br></div><div>Title: Classical and New Plumbings Bounding Contractible Manifolds and Homology Balls</div><div><br></div><div>Speaker: Oğuz Şavk (Boğaziçi University)</div><div><br></div><div>Abstract:
A central problem in low-dimensional topology asks which
homology 3-spheres bound contractible 4-manifolds and homology 4-balls.
In this talk, we address this problem for plumbed 3-manifolds and we
present the classical and new results together. Our approach is based on
Mazur’s famous argument which provides a unification of all results in a
fairly simple way.
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<div>Date: Friday, March 5, 2021</div>
<div>Time: 16:00</div>
<div>Zoom: Please send an e-mail for the seminar link.<span></span></div><div><span><br></span></div></div></div>
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