<div dir="ltr"><div><br></div><div>Dear All, <br><br></div><div> Bahar Acu from USC will talk this Tuesday at the Mimar Sinan Bomonti campus. <br></div><div><br></div><div><b>Title</b>: Higher Dimensional Symplectic Mapping Class Group Relations Generalizing the Chain Relation</div><div><br></div><div>
<pre style="margin-top:0px;margin-bottom:0px"><font face="Times New Roman"><b>Abstract:</b> In the first part of the talk, we will introduce basics and related notions of contact <br>and symplectic geometry, i.e., vocabulary needed for the second part of the talk. It is planned<br> to be accesible to all graduate students.<span style="color:rgb(128,0,0)">\</span></font></pre>
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<pre style="margin-top:0px;margin-bottom:0px"><font face="Times New Roman"> In the second part: we will examine symplectomorphisms of higher dimensional symplectic <br>manifolds by using fibered Dehn twists first introduced by Biran and Giroux. The Weinstein <br>domain of interest in this talk is <span style="color:rgb(0,128,0)">$W^{2n}=\{f(z_0, \dots, z_n)=\delta\} \cap B^{2n+2}$</span>, <br>given by a homogeneous polynomial <span style="color:rgb(0,128,0)">$f$</span>, which has a Boothby-Wang type boundary. <br>Despite the fact that many fibered Dehn twists cannot be expressed as a product of Dehn <br>twists, we are still able to show that </font><span style="font-family:"Times New Roman";color:rgb(0,128,0)">$\partial W$</span><span style="font-family:"Times New Roman""> has an open book decomposition carrying<br> a fibered Dehn twist which is symplectically isotopic to a product of </span><span style="font-family:"Times New Roman";color:rgb(0,128,0)">$k(k -1)^n$</span><span style="font-family:"Times New Roman""><br> right-handed Dehn twists along Lagrangian spheres. Moreover, we show that this <br>identification yields a generalization of the classical chain relation on surfaces. This is <br>joint work with Russell Avdek.<br><br></span></pre><pre style="margin-top:0px;margin-bottom:0px"><span style="font-family:"Times New Roman"">First Talk : 14:30<br></span></pre><pre style="margin-top:0px;margin-bottom:0px"><span style="font-family:"Times New Roman"">Second Talk : 15:45<br></span></pre><pre style="margin-top:0px;margin-bottom:0px"><span style="font-family:"Times New Roman"">Place : 106, Bomonti campus, MSGSU<br></span></pre><pre style="margin-top:0px;margin-bottom:0px"><span style="font-family:"Times New Roman"">Date : June 2, Tuesday<br><br></span></pre><pre style="margin-top:0px;margin-bottom:0px"><span style="font-family:"Times New Roman"">Best,<br></span></pre><pre style="margin-top:0px;margin-bottom:0px"><span style="font-family:"Times New Roman"">Mohan<br></span></pre></div></div>