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SUMMARY:Yang Zhou (Shanghai Center for Mathematical Sciences\, Fudan Unive
 rsity)
DTSTART:20220322T100000Z
DTEND:20220322T110000Z
DTSTAMP:20260423T022725Z
UID:Geolis/81
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/Geolis/81/">
 Quasimap wall-crossing in enumerative geometry</a>\nby Yang Zhou (Shanghai
  Center for Mathematical Sciences\, Fudan University) as part of Geometria
  em Lisboa (IST)\n\n\nAbstract\nThe theory of Gromov-Witten invariants is 
 a curve counting theory defined by integration on the moduli of stable map
 s. Varying the stability condition gives alternative compactifications of 
 the moduli space and defines similar invariants. One example is epsilon-st
 able quasimaps\, defined for a large class of GIT quotients. When epsilon 
 tends to infinity\, one recovers Gromov-Witten invariants. When epsilon te
 nds to zero\, the invariants are closely related to the B-model in physics
 . The space of epsilon's has a wall-and-chamber structure. In this talk\, 
 I will explain how wall-crossing helps to compute the Gromov-Witten invari
 ants and sketch a proof of the wall-crossing formula.\n
LOCATION:https://researchseminars.org/talk/Geolis/81/
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