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SUMMARY:Peter McNamara (University of Melbourne)
DTSTART:20220120T195000Z
DTEND:20220120T205000Z
DTSTAMP:20260423T005748Z
UID:GPRTatNU/40
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/GPRTatNU/40/
 ">Sheaves behaving badly</a>\nby Peter McNamara (University of Melbourne) 
 as part of Geometry\, Physics\, and Representation Theory Seminar\n\n\nAbs
 tract\nThis talk is about singularities of Schubert varieties\,\nstudied v
 ia sheaf-theoretic invariants like intersection cohomology\nand parity she
 aves. The motivation comes from the use of these sheaves\nin representatio
 n theory\, which began with the celebrated proof of the\nKazhdan-Lusztig c
 onjectures by Beilinson-Bernstein localisation. We\nwill present examples 
 of poor behaviour (in particular exhibit\nnon-perverse parity sheaves)\, w
 hich thwart historic overly-optimistic\nconjectures on the singularities o
 f Schubert varieties.\n
LOCATION:https://researchseminars.org/talk/GPRTatNU/40/
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