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Sur les $\ell$ -blocs de niveau zéro des groupes $p$ -adiques

Part of: Lie groups Algebraic number theory: local and $p$-adic fields

Published online by Cambridge University Press:  24 May 2018

Thomas Lanard
Thomas Lanard*
Affiliation:
Institut de Mathématiques de Jussieu - Paris Rive Gauche, 4 place Jussieu, 75005 Paris, France email thomas.lanard@imj-prg.fr
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Abstract

Let $G$ be a $p$ -adic group that splits over an unramified extension. We decompose $\text{Rep}_{\unicode[STIX]{x1D6EC}}^{0}(G)$ , the abelian category of smooth level $0$ representations of $G$ with coefficients in $\unicode[STIX]{x1D6EC}=\overline{\mathbb{Q}}_{\ell }$ or $\overline{\mathbb{Z}}_{\ell }$ , into a product of subcategories indexed by inertial Langlands parameters. We construct these categories via systems of idempotents on the Bruhat–Tits building and Deligne–Lusztig theory. Then, we prove compatibilities with parabolic induction and restriction functors and the local Langlands correspondence.

Keywords

representationlocal Langlands correspondencep-adic groupsl-block

MSC classification

Primary: 22E50: Representations of Lie and linear algebraic groups over local fields 11S37: Langlands-Weil conjectures, nonabelian class field theory
Type
Research Article
Information
Compositio Mathematica , Volume 154 , Issue 7 , July 2018 , pp. 1473 - 1507
Copyright
© The Author 2018 

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