Regular irreducible represntations of classical groups over finite quotient rings
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Publication:6318338
DOI10.2140/PJM.2021.311.221arXiv1905.02542MaRDI QIDQ6318338
Publication date: 3 May 2019
Abstract: A parametrization of irreducible representations associated with a regular adjoint orbit of a classical group over finite quotient rings of the ring of integer of a non-dyadic non-archimedean local field is presented. The parametrization is given by means of (a subset of) the character group of the centralizer of a representative of the regular adjoint orbit. Our method is based upon Weil representations over finite fields. More explicit parametrization in terms of tamely ramified extensions of the base field is given for the general linear group, the special linear group, the symplectic group and the orthogonal group.
Ordinary representations and characters (20C15) Representations of finite groups of Lie type (20C33)
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