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DTSTART:20180325T030000
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DTSTART:20171029T020000
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DTSTAMP:20260424T135404Z
UID:5853d1ad98032204442016@ist.ac.at
DTSTART:20171130T130000
DTEND:20171130T150000
DESCRIPTION:Speaker: Sam Gunningham\nhosted by Tamas Hausel\nAbstract: I wi
 ll describe a remarkable symmetric monoidal category - the Kostant-Whittak
 er category - associated to a reductive group G\, which acts centrally on 
 any G-category. The Kostant-Whittaker category may be interpreted as a qua
 ntization of the universal centralizer group scheme\, and its central acti
 on gives a quantization of a certain homorphism defined by Ngo. The catego
 ry and its central action appear most naturally in a Langlands dual incarn
 ation\, which is phrased in terms of convolution on the affine Grassmannia
 n\, via work of Bezrukavnikov\, Finkelberg and Mirkovic. There is also a p
 urely combinatorial incarnation which involves the affine Nil-Hecke algebr
 a and Soergel bimodules for the affine Weyl group. If there is time I will
  describe a potential application to a certain TQFT which computes the hom
 ology of character stacks. This is joint work with David Ben-Zvi and David
  Nadler.
LOCATION:Big Seminar room Ground floor / Office Bldg West (I21.EG.101)\, IS
 TA
ORGANIZER:jdeanton@ist.ac.at
SUMMARY:Sam Gunningham: Symmetries of convolution categories and the quantu
 m Ngo action
URL:https://talks-calendar.ista.ac.at/events/951
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