Mapping class groups: pronilpotent and cohomological approaches

Bordification of the moduli space of tropical abelian varieties, and unstable cohomology of the general linear group GL_g(Z)

19 Sept 2023, 17:00

55m

SRS

Speaker

Prof. Francis Brown (Oxford)

Description

I will explain a geometric argument to construct infinitely many non-zero unstable cohomology classes for the group GL_g(Z), some of which were known or conjectural, and others which are new.