Intertwining semisimple characters for p-adic classical groups

Skodlerack, Daniel and Stevens, Shaun (2020) Intertwining semisimple characters for p-adic classical groups. Nagoya Mathematical Journal, 238. pp. 137-205. ISSN 0027-7630

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Let G be an orthogonal, symplectic or unitary group over a non-archimedean local field of odd residual characteristic. This paper concerns the study of the “wild part” of an irreducible smooth representation of G, encoded in its “semisimple character”. We prove two fundamental results concerning them, which are crucial steps toward a complete classification of the cuspidal representations of G. First we introduce a geometric combinatorial condition under which we prove an “intertwining implies conjugacy” theorem for semisimple characters, both in G and in the ambient general linear group. Second, we prove a Skolem–Noether theorem for the action of G on its Lie algebra; more precisely, two semisimple elements of the Lie algebra of G which have the same characteristic polynomial must be conjugate under an element of G if there are corresponding semisimple strata which are intertwined by an element of G.

Item Type: Article
Uncontrolled Keywords: mathematics(all) ,/dk/atira/pure/subjectarea/asjc/2600
Faculty \ School: Faculty of Science > School of Mathematics
UEA Research Groups: Faculty of Science > Research Groups > Algebra and Combinatorics
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Depositing User: Pure Connector
Date Deposited: 10 May 2018 11:30
Last Modified: 13 May 2023 00:31
DOI: 10.1017/nmj.2018.23

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