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SUMMARY:Sucharit Sarkar (UCLA)
DTSTART:20211105T153000Z
DTEND:20211105T164500Z
DTSTAMP:20260423T005717Z
UID:CIRGET/52
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CIRGET/52/">
 Mixed invariants in Khovanov homology for unorientable cobordisms</a>\nby 
 Sucharit Sarkar (UCLA) as part of CRM - Séminaire du CIRGET / Géométrie
  et Topologie\n\n\nAbstract\n** Note : the event will take place at 11.30 
 am and not 11 am as usual.\n** Attention : l'horaire est modifié à 11.30
  exceptionnellement.\n\nUsing Bar-Natan's and Lee's deformations of Khovan
 ov homology of links\, we define minus\, plus\, and infinity versions of K
 hovanov homology. Given an unorientable cobordism in [0\,1]\\times S^3 fro
 m a link L_0 to a link L_1\, we define a mixed invariant as a map from the
  minus version of the Khovanov homology of L_0 to the plus version of the 
 Khovanov homology of L_1. The construction is similar to the mixed invaria
 nt in Heegaard Floer homology. This invariant can be used to distinguish e
 xotic cobordisms\, that is\, two cobordisms which are topologically isotop
 ic but not smoothly isotopic. This is joint with Robert Lipshitz.\n
LOCATION:https://researchseminars.org/talk/CIRGET/52/
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