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A new cohomology class on the moduli space of curves

Paul Norbury
Institution: 
Melbourne
Schedule: 
Wednesday, May 12, 2021 - 12:00 to 13:00
Location: 
Online
Abstract: 

I will define a collection of cohomology classes over the moduli space of stable Riemann surfaces which pull back naturally under the forgetful map and the inclusion of lower strata.  These classes have beautiful properties with conjectural relations to the KdV hierarchy, the moduli space of super Riemann surfaces and to polynomial relations among the kappa classes over the moduli space of stable Riemann surfaces.

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