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<b><span lang="EN-US" style="margin: 0px; font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">KOÇ UNIVERSITY MATH SEMINAR</span></b></p>
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<b><span lang="EN-US" style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);">Speaker </span></b><span lang="EN-US" style="margin: 0px; font-size: 12pt; color: rgb(0, 32, 96);"><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </span></span><span lang="EN-US" style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);">Pieter
Spaas, UCLA</span><span lang="EN-US" style="margin:0px;font-size:12pt"></span></p>
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<b><span lang="EN-US" style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);">Title </span></b><span lang="EN-US" style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);">Group
actions and equivalence relations</span></p>
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<b><span lang="EN-US" style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);">Date
</span></b><span lang="EN-US" style="margin: 0px; font-size: 12pt; color: rgb(0, 32, 96);"><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </span></span><span lang="EN-US" style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);">Tuesday,
November 02, 2021</span></p>
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<b><span lang="EN-US" style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);">Time </span></b><b><span lang="EN-US" style="margin: 0px; font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </span><span lang="EN-US" style="margin: 0px; color: rgb(0, 32, 96);"><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </span></span></b><span lang="EN-US" style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);">17:30-18:40
(online)</span></p>
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<b><span lang="EN-US" style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);">Place </span></b><b><span lang="EN-US" style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);">
</span><span lang="EN-US" style="margin:0px;font-size:12pt"><span style="margin: 0px; color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; font-size: 12pt;"> </span><span style="margin: 0px; color: rgb(0, 32, 96);"><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </span></span></span></b><span lang="EN-US" style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);">SCI
103</span><span lang="EN-US" style="margin: 0px; font-size: 12pt; color: rgb(0, 32, 96);"><i></i></span></p>
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<b><span lang="EN-US" style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);">Abstract: </span><span lang="EN-US" style="margin: 0px; font-size: 12pt; color: rgb(0, 32, 96);"><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </span></span></b><span lang="EN-US" style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);"> </span></p>
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<span lang="EN-US" style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);">Group actions of a countable group on a measure space give rise to interesting dynamical systems, and studying the associated orbit equivalence
relations has been the subject of a lot of study over many years. In this talk we will consider some natural constructions and discuss classification results for such equivalence relations. In particular, we will study how the behavior of certain central sequences
implies structural results on the involved equivalence relations and their products. All necessary notions will be introduced during the talk. This is partially based on joint work with Adrian Ioana.</span></p>
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<b><span lang="EN-US" style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);">Info:</span><span lang="EN-US" style="margin: 0px; font-size: 12pt; color: rgb(0, 32, 96);"><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </span></span></b><span style="margin: 0px; font-size: 12pt; color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif;">If
you would like to attend the seminar online, please send an email to Asgar Jamneshan at</span><span style="margin: 0px; font-size: 12pt; color: rgb(0, 32, 96);"><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </span></span><a href="mailto:ajamneshan@ku.edu.tr" target="_blank" rel="noopener noreferrer" data-auth="NotApplicable" data-linkindex="0" style="margin: 0px; color: rgb(5, 99, 193); text-decoration: underline;"><span style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);">ajamneshan@ku.edu.tr</span></a><span style="margin: 0px; font-size: 12pt; color: rgb(0, 32, 96);"><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </span></span><span style="margin: 0px; font-size: 12pt; color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif;">for
the Zoom link.</span></p>
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<span style="margin: 0px; font-size: 12pt; color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif;">The Mathematics Seminar schedule can be found at</span><span style="margin: 0px; font-size: 12pt; color: rgb(0, 32, 96);"><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </span></span><a href="https://mysite.ku.edu.tr/math-sci/" target="_blank" rel="noopener noreferrer" data-auth="NotApplicable" data-linkindex="1" style="margin: 0px; color: rgb(5, 99, 193); text-decoration: underline;"><span style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);">https://mysite.ku.edu.tr/math-sci/</span></a><span style="margin:0px;font-size:12pt"><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </span></span><span style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif; color: rgb(0, 0, 0);"></span></p>
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<span style="font-family:Arial,Helvetica,sans-serif; font-size:12pt">Asgar Jamneshan, </span><span style="color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans-serif; font-size: 12pt;">Department of Mathematics, </span><span style="color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;"></span><span style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: 12pt; background-color: rgb(255, 255, 255); display: inline !important;">Koç
University</span><span style="color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;"></span></div>
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