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SUMMARY:Markus Land (University of Copenhagen)
DTSTART:20210712T140000Z
DTEND:20210712T150000Z
DTSTAMP:20260423T004658Z
UID:MITTop/36
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/MITTop/36/">
 Grothendieck—Witt theory of Dedekind rings and the stable cohomology of 
 orthogonal and symplectic groups over Z</a>\nby Markus Land (University of
  Copenhagen) as part of MIT topology seminar\n\n\nAbstract\nI will first g
 ive a brief overview of how one can understand classical Grothendieck—Wi
 tt theories of rings in terms of K-theoretic and L-theoretic pieces. Using
  this\, I will explain how to determine various Grothendieck—Witt theori
 es\, in particular of Dedekind rings. As further application of these resu
 lts\, I will then give a calculation of the stable cohomology of orthogona
 l and symplectic groups over the integers focussing on the mod 2 cohomolog
 y.\n\n        This is all based on joint work with Calmès\, Dotto\, Harpa
 z\, Hebestreit\, Moi\, Nardin\, Nikolaus\, and Steimle\, and Hebestreit an
 d Nikolaus.\n
LOCATION:https://researchseminars.org/talk/MITTop/36/
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