English

On typical representations for depth-zero components of split classical groups

Representation Theory 2019-08-12 v2

Abstract

Let G{\bf G} be a split classical group over a non-Archimedean local field FF with the cardinality of the residue field qF>5q_F>5. Let MM be the group of FF-points of a Levi factor of a proper FF-parabolic subgroup of G{\bf G}. Let [M,σM]M[M, \sigma_M]_M be an inertial class such that σM\sigma_M contains a depth-zero Moy--Prasad type of the form (KM,τM)(K_M, \tau_M), where KMK_M is a hyperspecial maximal compact subgroup of MM. Let KK be a hyperspecial maximal compact subgroup of G(F){\bf G}(F) such that KK contains KMK_M. In this article, we classify s\mathfrak{s}-typical representations of KK. In particular, we show that the s\mathfrak{s}-typical representations of KK are precisely the irreducible subrepresentations of \indJKλ\ind_J^K\lambda, where (J,λ)(J, \lambda) is a level-zero GG-cover of (KM,τM)(K\cap M, \tau_M).

Keywords

Cite

@article{arxiv.1810.01774,
  title  = {On typical representations for depth-zero components of split classical groups},
  author = {Amiya Kumar Mondal and Santosh Nadimpalli},
  journal= {arXiv preprint arXiv:1810.01774},
  year   = {2019}
}

Comments

To appear in Representation theory of AMS

R2 v1 2026-06-23T04:27:17.396Z