Seminar series
Date
Tue, 15 Nov 2016
Time
14:15 -
15:15
Location
L4
Speaker
Greg Stevenson
Organisation
Bielefeld
For a group algebra over a self-injective ring
there are two stable categories: the usual one modulo projectives
and a relative one where one works modulo representations
which are free over the coefficient ring.
I'll describe the connection between these two stable categories,
which are "birational" in an appropriate sense.
I'll then make some comments on the specific case
where the coefficient ring is Z/nZ and give a more
precise description of the relative stable category.