Tame cuspidal representations in non-defining characteristics
Representation Theory
2021-07-12 v3 Number Theory
Abstract
Let F be a non-archimedean local field of odd residual characteristic p. Let G be a (connected) reductive group that splits over a tamely ramified field extension of F. We show that a construction analogous to Yu's construction of complex supercuspidal representations yields smooth, irreducible, cuspidal representations over an arbitrary algebraically closed field R of characteristic different from p. Moreover, we prove that this construction provides all smooth, irreducible, cuspidal R-representations if p does not divide the order of the Weyl group of G.
Cite
@article{arxiv.1905.06374,
title = {Tame cuspidal representations in non-defining characteristics},
author = {Jessica Fintzen},
journal= {arXiv preprint arXiv:1905.06374},
year = {2021}
}
Comments
12 pages; the revised version focuses on modular coefficients (previously Sections 5 to 7); for the case of complex representations see arXiv:1908.09819