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Vortrag

Depth and cohomological detection in modular invariant theory

Freitag 27.03.2009, 14:15 - 15:15

Veranstaltungsort:

Garching, FMI 02.08.011

Vortragender

Dr. Jonathan Elmer, Universität Aachen

The depth of a modular invariant ring is a measure of its structural complexity. It is bounded above by Krull dimension, with the two being equal if and only if the ring is Cohen-Macaulay. There is also a lower bound for depth, originally due to Ellingsrud and Skjelbred and later strengthened by Fleischmann, Kemper and Shank. In this talk we will discuss representations for which the lower bound is attained, as well as giving necessary and sufficient conditions for its attainment.

Veranstalter

Mathematik M 11

Ansprechpartner

Dr. Martin Kohls

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