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TZID:Europe/Vienna
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DTSTART:20170326T030000
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DTSTART:20171029T020000
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BEGIN:VEVENT
DTSTAMP:20260428T214826Z
UID:587ce5802456f785186148@ist.ac.at
DTSTART:20170517T134500
DTEND:20170517T154500
DESCRIPTION:Speaker: Yiannis Loizides\nhosted by Tamas Hausel\nAbstract: Th
 e first part of the talk will be an introduction to Hamiltonian loop-group
  spaces\, quasi-Hamiltonian spaces\, their 'quantization'\, and the quanti
 zation-commutes-with-reduction ([Q\,R]=0) theorem in this context. Combine
 d with a vanishing result for higher cohomology\, the [Q\,R]=0 theorem imp
 lies the Verlinde formula for moduli spaces of flat connections on Riemann
  surfaces. In the second part of the talk\, I will describe a new approach
  to the [Q\,R]=0 theorem inspired by work of Paradan\, Szenes-Vergne and B
 oysal-Vergne. The approach involves decomposing the fixed-point formula us
 ing a combinatorial identity\, and re-organizing into a new formula with t
 erms indexed by the critical values of the norm-square of the moment map. 
 This is joint work with E. Meinrenken.\n
LOCATION:Seminar room Big Ground floor / Office Bldg West (I21.EG.101)\, IS
 TA
ORGANIZER:jdeanton@ist.ac.at
SUMMARY:Yiannis Loizides: [Q\,R]=0 and Verlinde series
URL:https://talks-calendar.ista.ac.at/events/619
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