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We incorporate covers of quasisplit reductive groups into the Langlands program, defining an L-group associated to such a cover. We work with all covers that arise from extensions of quasisplit reductive groups by $\mathbf{K}_2$ -- the…

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

For $E/F$ quadratic extension of local fields and $G$ a reductive algebraic group over $F$, the paper formulates a conjecture classifying irreducible admissible representations of $G(E)$ which carry a $G(F)$ invariant linear form, and the…

Number Theory · Mathematics 2015-12-15 Dipendra Prasad

Let $G$ be a classical group defined over a local field $F$ of characteristic zero. Let $\pi$ be an irreducible admissible representation $\pi$ of $G(F)$, which is of Casselman-Wallach type if $F$ is archimedean. If $\pi$ has a generic…

Representation Theory · Mathematics 2025-09-09 Dihua Jiang , Dongwen Liu , Lei Zhang

We consider the restriction and induction of representations between a covering group and its derived subgroup, both on the representation-theoretic side and the L-parameter side. In particular, restriction of a genuine principal series is…

Representation Theory · Mathematics 2021-02-24 Fan Gao , Freydoon Shahidi , Dani Szpruch

In this work we further develop a nonlocal calculus theory (initially introduced in [5]) associated with singular fractional-type operators which exhibit kernels with finite support of interactions. The applicability of the framework to…

Analysis of PDEs · Mathematics 2023-11-10 José C. Bellido , Javier Cueto , Mikil Foss , Petronela Radu

We provide a general construction procedure for antilinearly invariant complex root spaces. The proposed method is generic and may be applied to any Weyl group allowing to take any element of the group as a starting point for the…

High Energy Physics - Theory · Physics 2012-04-13 Andreas Fring , Monique Smith

If $E/F$ is a quadratic extension $p$-adic fields, we first prove that the $\mathrm{SL}_n(F)$-distinguished representations inside a distinguished unitary L-packet of $\mathrm{SL}_n(E)$ are precisely those admitting a degenerate Whittaker…

Representation Theory · Mathematics 2023-02-22 U. K. Anandavardhanan , Nadir Matringe

This paper is a study of the bases introduced by Chari-Loktev for local Weyl modules of the current algebra associated to a special linear Lie algebra. Partition overlaid patterns, POPs for short---whose introduction is one of the aims of…

Representation Theory · Mathematics 2017-08-29 K. N. Raghavan , B. Ravinder , Sankaran Viswanath

Let $G$ be a connected reductive group over a field $F=\mathbb{F}_q((t))$ splitting over $\overline{\mathbb{F}}_q((t))$. Following [KV,DR], a tamely unramified Langlands parameter $\lambda:W_F\to{}^L G(\overline{\mathbb{Q}}_{\ell})$ in…

Representation Theory · Mathematics 2025-08-11 Roman Bezrukavnikov , Yakov Varshavsky

The article arXiv:1309.0945 by Do and Thiele develops a theory of Carleson embeddings in outer $L^p$ spaces for the wave packet transform of functions in $ L^p(\mathbb R)$, in the $2\leq p\leq \infty$ range referred to as local $L^2$. In…

Classical Analysis and ODEs · Mathematics 2016-05-04 Francesco Di Plinio , Yumeng Ou

Let $G$ be a symplectic group over a nonarchimedean local field of characteristic zero and odd residual characteristic. Given an irreducible cuspidal representation of G, we determine its Langlands parameter (equivalently, its Jordan blocks…

Representation Theory · Mathematics 2019-02-13 Corinne Blondel , Guy Henniart , Shaun Stevens

We give a proof of the Breuil-Schneider conjecture in a large number of cases, which complement the indecomposable case, which we dealt with earlier in [Sor]. In some sense, only the Steinberg representation lies at the intersection of the…

Number Theory · Mathematics 2016-01-20 Claus M. Sorensen

Reeder and Yu have recently given a new construction of a class of supercuspidal representations called epipelagic representations. We explicitly calculate the Local Langlands Correspondence for certain families of epipelagic…

Number Theory · Mathematics 2020-02-12 Tony Feng , Niccolo Ronchetti , Cheng-Chiang Tsai

In conventional gauge theory, a charged point particle is described by a representation of the gauge group. If we propagate the particle along some path, the parallel transport of the gauge connection acts on this representation. The…

High Energy Physics - Theory · Physics 2008-11-26 Hendryk Pfeiffer

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

We show that for any tame regular discrete series parameter of GSp_4 or its inner form GU_2(D), the L-packet attached by the local Langlands conjecture agrees with the L-packet of depth zero supercuspidal representations constructed by…

Number Theory · Mathematics 2011-12-26 Jaime Lust

We develop a theory of `non-abelian higher special elements' in the non-commutative exterior powers of the Galois cohomology of $p$-adic representations. We explore their relation to the theory of organising matrices and thus to the Galois…

Number Theory · Mathematics 2022-01-20 Daniel Macias Castillo , Kwok-Wing Tsoi

For every simple Hermitian Lie group $G$, we consider a certain maximal parabolic subgroup whose unipotent radical $N$ is either abelian (if $G$ is of tube type) or two-step nilpotent (if $G$ is of non-tube type). By the generalized…

Representation Theory · Mathematics 2024-01-15 Jan Frahm , Gestur Ólafsson , Bent Ørsted

We establish a local rigidity theorem for quasi--Lie brackets on quaternionic Banach right modules. Under quantitative control of antisymmetry and Jacobi defects, we construct an explicit bilinear correction that preserves right…

Rings and Algebras · Mathematics 2025-10-14 Nassim Athmouni

We study the two primary families of spaces of finite element differential forms with respect to a simplicial mesh in any number of space dimensions. These spaces are generalizations of the classical finite element spaces for vector fields,…

Numerical Analysis · Mathematics 2014-01-29 Douglas N. Arnold , Richard S. Falk , Ragnar Winther