Fourier matrices for unipotent characters
Representations of Finite and Algebraic Groups April 09, 2018 - April 13, 2018
Location: SLMath: Eisenbud Auditorium
Finite groups of Lie type
Unipotent characters
Deligne-Lusztig theory
Spetses
14-Dudas
[This is a work in progress with Bonnafé-Broué-Malle-Michel-Rouquier.] In this talk I will explain how to construct a non-trivial action of SL2(Z) on the vector space spanned by unipotent characters. The existence of such an action follows from Lusztig's classification of unipotent characters, but I will present a global construction relying on traces of automorphisms of Deligne--Lusztig varieties. The advantage of this approach is that it can be naturally generalized to Spetses, thus giving candidates for Fourier matrices and unipotent character sheaves for Spetses.
Notes
|
Download |
14-Dudas
H.264 Video |
14-Dudas.mp4
|
Download |
Please report video problems to itsupport@slmath.org.
See more of our Streaming videos on our main VMath Videos page.