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SUMMARY:Hannah Larson (Harvard)
DTSTART:20230126T195000Z
DTEND:20230126T205000Z
DTSTAMP:20260423T005851Z
UID:GPRTatNU/70
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/GPRTatNU/70/
 ">Cohomology of moduli spaces of stable curves</a>\nby Hannah Larson (Harv
 ard) as part of Geometry\, Physics\, and Representation Theory Seminar\n\n
 \nAbstract\nThe cohomology rings of moduli spaces often have distinguished
  classes called tautological classes. This talk is about the special situa
 tion when all cohomology classes on a moduli space are tautological. I wil
 l start with the example of projective space. Then I'll introduce the modu
 li spaces M_{g\,n}-bar of n-poined\, stable genus g curves\, using the exa
 mple M_{2\,0}-bar as a guide. At the end\, I'll present several new small 
 values (g\, n) where we have proven that all classes on M_{g\,n}-bar are t
 autological. This is joint work with Samir Canning.\n
LOCATION:https://researchseminars.org/talk/GPRTatNU/70/
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