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SUMMARY:The Deodhar stratification via hybrid normal forms
DTSTART:20250410T090000Z
DTEND:20250410T100000Z
DTSTAMP:20260420T161900Z
UID:indico-event-317@math-events.uni-bonn.de
DESCRIPTION:Speakers: Till Wehrhan (Edinburgh)\n\nThe intersections of pos
 itive and negative Schubert cells play an important role in Kazhdan-Luszti
 g theory as they geometrize the R-polynomials. Today\, these varieties are
  known as Kazhdan-Lusztig-Deodhar-Richardson (or short KLDR) varieties. In
  the '80s\, Deodhar introduced a decomposition of KLDR varieties of any fl
 ag varieties with the remarkable property that each component is isomorphi
 c to a product of an affine space and a torus. In a recent work on standar
 d extension algebras\, Eberhardt and Stroppel introduced a further decompo
 sition of the KLDR varieties of Grassmannians to which they referred to as
  Bruhat-type stratification. The components of this decomposition are agai
 n of the same shape as the components of the Deodhar decomposition. In thi
 s talk\, we will see that the Deodhar and Bruhat-type decomposition actual
 ly coincide. \n\nhttps://math-events.uni-bonn.de/event/317/
LOCATION:Endenicher Allee 60/1-016 - Lipschitzsaal (Mathezentrum)
URL:https://math-events.uni-bonn.de/event/317/
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