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SUMMARY:Robert Cass (Harvard)
DTSTART:20210302T000000Z
DTEND:20210302T005000Z
DTSTAMP:20260423T041623Z
UID:UCLA_NTS/24
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UCLA_NTS/24/
 ">A geometric construction of central elements in affine mod $p$ Hecke alg
 ebras</a>\nby Robert Cass (Harvard) as part of UCLA Number Theory Seminar\
 n\n\nAbstract\nLet $G$ be a split connected reductive group over a local f
 ield of positive characteristic. In the case of characteristic zero coeffi
 cients\, Gaitsgory gave a geometric construction of central elements in th
 e affine Hecke algebra of $G$ by applying a nearby cycles functor on a Bei
 linson-Drinfeld affine Grassmannian. In this talk I will explain how to do
  an analogous construction for the affine mod $p$ Hecke algebra of $G$. Ou
 r techniques combine the geometry of Gaitsgory's construction (and simplif
 ications due to Zhu) with perverse mod $p$ sheaves and tools from $F$-sing
 ularities.\n
LOCATION:https://researchseminars.org/talk/UCLA_NTS/24/
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