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We construct an endoscopic decomposition for local L-packets associated to irreducible cuspidal Deligne-Lusztig representations. Moreover, the obtained decomposition is compatible with inner twistings.

Representation Theory · Mathematics 2007-05-23 David Kazhdan , Yakov Varshavsky

We explicitly classify all the component groups associated to the non-supercuspidal, tempered $L$-parameters of $\mathrm{SL}_3(F)$ for a $p$-adic field $F$ of characteristic $0$ by direct case-by-case computations in…

Representation Theory · Mathematics 2025-07-29 Kwangho Choiy , Doyon Kim , Razan Taha , Pan Yan

By the works of Yu, Kim and Hakim-Murnaghan, we have a parameterization and construction of all supercuspidal representations of a reductive $p$-adic group in terms of supercuspidal data, when $p$ is sufficiently large. In this paper, we…

Representation Theory · Mathematics 2017-04-19 Hung Yean Loke , Jia-jun Ma

Let G be a classical p-adic group and $(\psi ,\epsilon)$ the Langlands parameter of an irreducible supercuspidal representation of a Levi subgroup of G. Using data from $(\psi ,\epsilon)$, we determine explicitly the intertwining algebra of…

Representation Theory · Mathematics 2009-10-06 Volker Heiermann

In this paper, we compute the characters of the simple supercuspidal representations of SL(2,F) and SL(3,F) on split tori. Here, F is an arbitrary non-Archimedean local field of characteristic zero.

Representation Theory · Mathematics 2012-10-17 Moshe Adrian

Genestier--Lafforgue and Fargues--Scholze have constructed a semisimple local Langlands paramterization for reductive groups over equicharacteristic local fields. Assuming a version of the stable twisted trace formula for function fields,…

Number Theory · Mathematics 2025-03-03 Raphaël Beuzart-Plessis , Michael Harris , Jack Thorne

The category of representations with a strongly typical central character of a basic classical Lie superalgebra is proven to be equivalent to the category of representations of its even part corresponding to an appropriate central…

Representation Theory · Mathematics 2007-05-23 Maria Gorelik

Let G be a connected simple adjoint p-adic group not isomorphic to a projective linear group PGL(m,D) of a division algebra D, or an adjoint ramified unitary group of a split hermitian form in 3 variables. We prove that G admits an…

Number Theory · Mathematics 2018-01-01 Marie-France Vignéras

We establish a correspondence (or duality) between the characters and the crystal bases of finite-dimensional representations of quantum groups associated to Langlands dual semi-simple Lie algebras. This duality may also be stated purely in…

Quantum Algebra · Mathematics 2011-03-08 Edward Frenkel , David Hernandez

Zelevinsky's classification theory of discrete series of $p$-adic general linear groups has been well known. M{\oe}glin and Tadic gave the same kind of theory for $p$-adic classical groups, which is more complicated due to the occurrence of…

Representation Theory · Mathematics 2017-02-16 Bin Xu

The restriction of a supercuspidal representation of SL_2(k), for k a local nonarchimedean field, to a maximal compact subgroup decomposes as a multiplicity-free direct sum of irreducible representations. We explicitly describe this…

Representation Theory · Mathematics 2012-12-12 Monica Nevins

The formal degree of a unipotent discrete series character of a simple linear algebraic group over a non-archimedean local field (in the sense of Lusztig), is a rational function of the cardinality q of the residue field. The irreducible…

Representation Theory · Mathematics 2020-09-08 Yongqi Feng , Eric Opdam

For a classical group over a non-archimedean local field of odd residual characteristic p, we construct all cuspidal representations over an arbitrary algebraically closed field of characteristic different from p, as representations induced…

Representation Theory · Mathematics 2015-11-30 Robert Kurinczuk , Shaun Stevens

We give a modern exposition of the construction, parameterization, and character relations for discrete series L-packets of real reductive groups, which are fundamental results due to Langlands and Shelstad. This exposition incorporates…

Representation Theory · Mathematics 2026-04-29 Jeffrey Adams , Tasho Kaletha

Cuspidal representations of a reductive p-adic group G over a field of characteristic different from p are relatively injective and projective with respect to extensions that split by a U-equivariant linear map for any subgroup U that is…

Representation Theory · Mathematics 2016-01-26 Ralf Meyer

We establish the unicity of types for depth-zero supercuspidal representations of an arbitrary $p$-adic group $G$, showing that each depth-zero supercuspidal representation of $G$ contains a unique conjugacy class of typical representations…

Representation Theory · Mathematics 2021-02-01 Peter Latham

We define semi-simple strata, semi-simple characters and semi-simple types in G_2(F). With some of these types we construct supercuspidal representations of this group.

Representation Theory · Mathematics 2011-04-08 Laure Blasco , Corinne Blondel

In one article, the author has defined an L-group associated to a cover of a quasisplit reductive group over a local or global field. In another article, Wee Teck Gan and Fan Gao define (following an unpublished letter of the author) an…

Number Theory · Mathematics 2016-01-08 Martin H. Weissman

Let H be a connected reductive group defined over a non-archimedean local field F of characteristic p>0. Using Poincar\'e series, we globalize supercuspidal representations of H(F) in such a way that we have control over ramification at all…

Number Theory · Mathematics 2016-04-07 Wee Teck Gan , Luis Lomelí

Let $F$ be a non-archimedean local field of odd residual characteristic. We compute the Jordan set of a simple cuspidal representation of a symplectic group over $F$, using explicit computations of generators of the Hecke algebras of covers…

Representation Theory · Mathematics 2023-11-01 Corinne Blondel , Guy Henniart , Shaun Stevens