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Let $E/F$ be a finite and Galois extension of non-archimedean local fields. Let $G$ be a connected reductive group defined over $E$ and let $M: = \mathfrak{R}_{E/F}\, G$ be the reductive group over $F$ obtained by Weil restriction of…

Representation Theory · Mathematics 2020-07-03 Anne-Marie Aubert , Roger Plymen

It is well-known that the existence of more than two ends in the sense of J.R. Stallings for a finitely generated discrete group $G$ can be detected on the cohomology group $\mathrm{H}^1(G,R[G])$, where $R$ is either a finite field, the…

Group Theory · Mathematics 2021-01-22 Ilaria Castellano

Let G be a reductive p-adic group, H(G) its Hecke algebra and S(G) its Schwartz algebra. We will show that these algebras have the same periodic cyclic homology. This might be used to provide an alternative proof of the Baum-Connes…

K-Theory and Homology · Mathematics 2009-10-06 Maarten Solleveld

In this article, we consider the links between parabolic induction and the local Langlands correspondence. We enunciate a conjecture about the (enhanced) Langlands parameters of supercuspidal representation of split reductives $p$-adics…

Representation Theory · Mathematics 2017-07-19 Ahmed Moussaoui

Let F be a non-archimedean local field. We establish the local Langlands correspondence for all inner forms of the group $SL_n (F)$. It takes the form of a bijection between, on the one hand, conjugacy classes of Langlands parameters for…

Representation Theory · Mathematics 2016-12-09 Anne-Marie Aubert , Paul Baum , Roger Plymen , Maarten Solleveld

Let G be a p-adic reductive group, and R an algebraically closed field. Let us consider a smooth representation of G on an R-vector space V. Fix an open compact subgroup K of G and a smooth irreducible representation of K on a…

Representation Theory · Mathematics 2023-02-15 Guy Henniart , Vincent Sécherre

Inspired by Emerton's work for GL(2), we study the completed cohomology of the tower of finite sets associated with a definite unitary group in two variables. When p splits (and other technical assumptions are fulfilled), we show that the…

Number Theory · Mathematics 2013-04-18 Przemyslaw Chojecki , Claus Sorensen

We continue the analysis of definably compact groups definable in a real closed field $\mathcal{R}$. In [3], we proved that for every definably compact definably connected semialgebraic group $G$ over $\mathcal{R}$ there are a connected…

Logic · Mathematics 2017-05-23 Eliana Barriga

In this paper we study the cohomology of PEL-type Rapoport-Zink spaces associated to unramified unitary similitude groups over $\Q_p$ in an odd number of variables. We extend the results of Kaletha-Minguez-Shin-White to construct a local…

Number Theory · Mathematics 2021-07-01 Alexander Bertoloni Meli , Kieu Hieu Nguyen

In the representation theory of reductive $p$-adic groups $G$, the issue of reducibility of induced representations is an issue of great intricacy. It is our contention, expressed as a conjecture in [3], that there exists a simple geometric…

Representation Theory · Mathematics 2010-08-05 Anne-Marie Aubert , Paul Baum , Roger Plymen

Suppose $G$ is a locally solid lattice group. It is known that there are non-equivalent classes of bounded homomorphisms on $G$ which have topological structures. In this paper, our attempt is to assign lattice structures on them. More…

Functional Analysis · Mathematics 2019-09-06 Omid Zabeti

Lusztig's classification of unipotent representations of finite reductive groups depends only on the associated Weyl group $W$ (endowed with its Frobenius automorphism). All the structural questions (families, Harish-Chandra series,…

Representation Theory · Mathematics 2022-08-05 Cédric Bonnafé

We prove the Fargues-Rapoport conjecture for p-adic period domains: for a reductive group G over a p-adic field and a minuscule cocharacter {\mu} of G, the weakly admissible locus coincides with the admissible one if and only if the…

Algebraic Geometry · Mathematics 2017-10-20 Miaofen Chen , Laurent Fargues , Xu Shen

Let G be an unramified reductive group over a non archimedian local field F. The so-called "Langlands Fundamental Lemma" is a family of conjectural identities between orbital integrals for G(F) and orbital integrals for endoscopic groups of…

Algebraic Geometry · Mathematics 2007-05-23 G. Laumon , B. C. Ngo

In some recent work, Lusztig outlined a generalisation of the construction of Deligne and Lusztig to reductive groups over finite rings coming from the ring of integers in a local field, modulo some power of the maximal ideal. Lusztig…

Representation Theory · Mathematics 2007-05-23 Alexander Stasinski

The local Langlands correspondence for GL(n) of a non-Archimedean local field $F$ parametrizes irreducible admissible representations of $GL(n,F)$ in terms of representations of the Weil-Deligne group $WD_F$ of $F$. The correspondence,…

Number Theory · Mathematics 2007-05-23 Michael Harris

We associate to every irreducible representation of a reductive group over a local field of equal characteristics a local Langlands parameter up to semisimplification and prove the compatibility with the global parameterization constructed…

Algebraic Geometry · Mathematics 2018-08-07 Alain Genestier , Vincent Lafforgue

We prove that the homology groups of any connected reductive group over a field with coefficients in the Steinberg representation vanish in a range. The generalizes work of Ash-Putman-Sam on the classical split groups. We state a…

Algebraic Topology · Mathematics 2025-09-03 Jeremy Miller , Peter Patzt , Andrew Putman

We generalize the work of M. Harris and R. Taylor on the local Langlands correspondence for the linear group over $\mathbb{Q}_p$. We prove some cases of the Kottwitz conjectures for the supercuspidal part of the compactly supported…

Number Theory · Mathematics 2009-09-25 Laurent Fargues

In this paper, we prove the generic overconvergence of relative rigid cohomology with coefficient, by using the semistable reduction conjecture for overconvergent $F$-isocrystals (which is recently shown by Kedlaya).

Number Theory · Mathematics 2008-05-22 Atsushi Shiho