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20222026
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math.RT2026

The extended Fargues--Scholze spectral action

Peter Dillery, Arnaud Eteve

Let be a connected reductive group over a non-archimedean local field. The main result of Fargues and Scholze [FS21] for the geometrization of the local Langlands correspondenc…

math.RT2025

The Parabolic K-motivic Hecke Category

Jens Niklas Eberhardt, Arnaud Eteve

We define and study the parabolic K-motivic Hecke category of a (possibly disconnected) Kac-Moody group. Our main result is a combinatorial description via singular K-theory Soerge…

math.RT2025

Jordan decomposition, categorical traces and Deligne-Lusztig theory

Arnaud Eteve

This paper is a continuation of the author's previous work. We use the categorical trace formalism to construct a categorical Jordan decomposition for representations of finite gro…

math.RT2024

Tilting representations of finite groups of Lie type

Arnaud Eteve

Let be a connected reductive group over a finite field of characteristic . In this paper, we study a category which we call Deligne--Lusztig cate…

math.RT2024

Free monodromic Hecke categories and their categorical traces

Arnaud Eteve

The goal of this paper is to give a new construction of the free monodromic categories defined by Yun. We then use this formalism to give simpler constructions of the free monodrom…

math.RT2024

Universal Koszul Duality for Kac-Moody Groups

Jens Niklas Eberhardt, Arnaud Eteve

We prove a monoidal equivalence, called universal Koszul duality, between genuine equivariant K-motives on a Kac-Moody flag variety and constructible monodromic sheaves on its Lang…

math.RT2022

Kazhdan-Laumon sheaves and Deligne-Lusztig representations

Arnaud Eteve

Let be a reductive group over a finite field with a maximal unipotent subgroup , we consider certain sheaves on defined by Kazhdan and Laumon and show that their cohom…