Thomas Nikolaus : The stable cohomology of orthogonal and symplectic groups over the integers

Posted by Ian Tobasco , part of the Departmental Colloquium.

At

April 9, 2021, 3 p.m.

In

Zoom

Abstract

We explain how to compute the stable cohomology of the groups O(n,n;Z) and Sp(n, Z). Here stable means that n tends to infinity. This is joint work with Hebestreit and Land and is a consequence of recent results about Grothendieck-Witt theory.