Algebra and Analysis Seminar: Unramified (Milnor-) Witt groups

Date(s)
Wednesday 8th October 2014 (16:00-17:00)
Contact

Yves van Gennip (University of Nottingham) Y.Vangennip@nottingham.ac.uk

Description

Stefan Gille (University of Alberta)

Unramified (Milnor-) Witt groups

Abstract:

We will present a proof that the unramified (Milnor-)Witt groups are a birational invariant of regular and proper schemes over a field of characteristic not 2. This has some funny consequences, for instance the Witt group is a birational invariant of surfaces. I will then discuss some results around the Gersten conjecture and presentations of the Milnor-Witt group of a regular localring.

School of Mathematical Sciences

The University of Nottingham
University Park
Nottingham, NG7 2RD

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