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UID:10002b368f8bd98060eee0b8dcd88e3f
CATEGORIES:Geometry, Symmetry and Physics Seminar
CREATED:20211205T160210
SUMMARY:Counting pointlike instantons virtually without gluing (POSTPONED)
LOCATION:Email organizers for zoom info
DESCRIPTION:<p style="color: #222222; font-family: Arial, Helvetica, sans-serif; font-s
 ize: small; font-weight: 400; letter-spacing: normal; orphans: 2; text-alig
 n: start; text-indent: 0px; text-transform: none; white-space: normal; wido
 ws: 2; word-spacing: 0px; background-color: #ffffff;">&nbsp;</p><p style="c
 olor: #222222; font-family: Arial, Helvetica, sans-serif; font-size: small;
  font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; t
 ext-indent: 0px; text-transform: none; white-space: normal; widows: 2; word
 -spacing: 0px; background-color: #ffffff;">Abstract:&nbsp;In defining sympl
 ectic invariants such as Gromov-Witten invariants or Floer homology, a cruc
 ial step is the construction of the virtual fundamental cycle or the virtua
 l fundamental chain (VFC). In this highly involved procedure, one typically
  needs the so-called "gluing construction" to obtain local charts. It was T
 ian who firstly noticed that to construct VFC in situations such as Gromov-
 Witten invariants, one does not necessarily need gluing. In this talk, I wi
 ll review the VFC construction in Gromov-Witten theory and briefly explain 
 Tian's idea. Then I will show how to apply this idea to define virtual coun
 ts of pointlike instantons in gauged linear sigma model.&nbsp;This talk is 
 based on the joint work with Tian.</p><p>&nbsp;</p><p>(Edit: This talk is p
 ostponed until the speaker gets over a cold.)&nbsp;</p>
CONTACT:Guangbo Xu, Texas A&amp;M
DTSTAMP:20260827T103137
DTSTART;TZID=America/New_York:20211207T130000
DTEND;TZID=America/New_York:20211207T140000
SEQUENCE:0
TRANSP:OPAQUE
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