Algebra Seminar by Meinolf Geck
-
This is a past event
On the Frobenius-Schur indicators of unipotent characters
Let G be a finite group of Lie type. If G is of split type, then Lusztig and Vogan have recently established a remarkable identity involving the Frobenius-Schur indicators of the unipotent characters of G and Kottwitz' involution module for the Weyl group W of G. In joint work with Malle, we have extended this to non-split groups G. The main difficulty consists of dealing with extensions of characters of W to the semidirect product of W by an automorphism of W.
- Speaker
- Meinolf Geck (Aberdeen)