GENERAL SEMINAR

“Regularity of rings of polynomial invariants”

by

Peter Symonds
(University of Manchester)

Abstract: We will discuss the properties of the Castelnuovo-Mumford regularity of a graded module. Then we will sketch some of the ideas in the proof that when a finite group G acts on a polynomial ring in n variables the regularity of the ring of invariants is at most 0. As a consequence we can show that the ring is generated in degrees at most n(|G|-1) (for n,|G| not 1).

Date : May 13, 2009 (Wednesday)

Time : 15.40

Place: Mathematics Seminar Room SA141

Tea will be served before the seminar.