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SUMMARY:Lothar Goettsche (ICTP)
DTSTART:20220504T140000Z
DTEND:20220504T150000Z
DTSTAMP:20260404T121427Z
UID:ICTP-IGAP/2
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ICTP-IGAP/2/
 ">Computation of the vertical Vafa-Witten invariants II: localization on H
 ilbert schemes of points</a>\nby Lothar Goettsche (ICTP) as part of ICTP/I
 GAP Algebraic Geometry Seminar\n\n\nAbstract\nLast time we used nested Hil
 bert schemes to express vertical Vafa-Witten invariants of a surface S in 
 terms of (unknown) universal power series\, which are generating functions
  for intersection numbers on Hilbert schemes of points on S.\n\nIn this le
 cture we will reduce to the case that the surface S is toric\, and then ex
 plain how to explicitly compute the generating functions via localization.
  We will present the formulas obtained.\n\nNext time we will sketch how to
  use Mochizuki's formula to do the same for the horizontal Vafa-Witten inv
 ariants.\n\nPRESENCE: ICTP Leonardo Da Vinci Building\, Luigi Stasi Lect. 
 Room\n\nONLINE:\nRegister in advance for this meeting:\nhttps://zoom.us/me
 eting/register/tJEtd-GvqjorE9BtDAqiw4qFvW-xmtQQ0wOO \n\nAfter registering\
 , you will receive a confirmation email containing information about joini
 ng the meeting.\n
LOCATION:https://researchseminars.org/talk/ICTP-IGAP/2/
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