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SUMMARY:Ana Balibanu (Harvard)
DTSTART:20200626T191500Z
DTEND:20200626T194500Z
DTSTAMP:20260424T134208Z
UID:GRT-2020/27
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/GRT-2020/27/
 ">Perverse sheaves and the cohomology of regular Hessenberg varieties</a>\
 nby Ana Balibanu (Harvard) as part of Geometric Representation Theory conf
 erence\n\n\nAbstract\nHessenberg varieties are a distinguished family of p
 rojective varieties associated to a semisimple complex algebraic group. We
  use the formalism of perverse sheaves to study their cohomology rings. We
  give a partial characterization\, in terms of the Springer correspondence
 \, of the irreducible representations which appear in the action of the We
 yl group on the cohomology ring of a regular semisimple Hessenberg variety
 . We also prove a support theorem for the universal family of regular Hess
 enberg varieties\, and we deduce that its fibers\, though not necessarily 
 smooth\, always have the "Kähler package". This is joint work with Peter 
 Crooks.\n
LOCATION:https://researchseminars.org/talk/GRT-2020/27/
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