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We construct irreducible unitary representations of a finitely generated free group which are weakly contained in the left regular representation and in which a given linear combination of the generators has an eigenvalue. When the…

Operator Algebras · Mathematics 2007-05-23 William L. Paschke

We prove that any reductive group G over a non-Archimedean local field has a cuspidal complex representation.

Representation Theory · Mathematics 2012-05-15 Arno Kret

Let $G$ be a connected reductive group over a totally real field $F$ which is compact modulo center at archimedean places. We find congruences modulo an arbitrary power of p between the space of arbitrary automorphic forms on $G(\mathbb…

Number Theory · Mathematics 2021-07-01 Jessica Fintzen , Sug Woo Shin

This thesis is devoted to the study of the interactions existing between the algebraic structure of locally compact groups and the properties of their continuous unitary representations, with a special emphasis on the Type I groups. On the…

Representation Theory · Mathematics 2023-06-08 Lancelot Semal

Identities of complex irreducible representations of finite groups can be explicitly constructed from character value sets. Among other things, these identities determine representations up to Gassmann equivalency. Some examples of…

Representation Theory · Mathematics 2026-01-05 Alexander Kushkuley

In the case of p-adic general linear groups, each irreducible representation is parabolically induced by a tensor product of irreducible representations supported by cuspidal lines. One gets in this way a parameterization of the irreducible…

Representation Theory · Mathematics 2020-10-30 Marko Tadic

We give new criteria for the irreducibility of parabolic induction on the general linear group and its inner forms over a local non-archimedean field. In particular, we give a necessary and sufficient condition when the inducing data is of…

Number Theory · Mathematics 2017-01-12 Erez Lapid , Alberto Mínguez

We classify the irreducible representations of smooth, connected affine algebraic groups over a field, by tackling the case of pseudo-reductive groups. We reduce the problem of calculating the dimension for pseudo-split pseudo-reductive…

Representation Theory · Mathematics 2019-11-19 Michael Bate , David I. Stewart

For reductive groups $G$ over a number field we discuss automorphic liftings from cuspidal irreducible automorphic representations $\pi$ of $G(\mathbb{A})$ to cuspidal irreducible automorphic representations on $H(\mathbb{A})$ for the…

Representation Theory · Mathematics 2023-06-22 Mirko Rösner , Rainer Weissauer

We prove new automorphy lifting theorems for residually reducible Galois representations of unitary type in which the residual representation is permitted to have an arbitrary number of irreducible constituents.

Number Theory · Mathematics 2020-08-14 Patrick B. Allen , James Newton , Jack A. Thorne

A parametrization of irreducible unitary representations associated with the regular adjoint orbits of a hyperspecial compact subgroup of a reductive group over a non-dyadic non-archimedean local filed is presented. The parametrization is…

Representation Theory · Mathematics 2017-02-28 Koichi Takase

We prove some basic results about irreducible components of varieties of modules for an arbitrary finitely generated associative algebra. Our work generalizes results of Kac and Schofield on representations of quivers, but our methods are…

Algebraic Geometry · Mathematics 2007-05-23 William Crawley-Boevey , Jan Schröer

Let $F$ be a global field. Let $G$ and $H$ be two connected reductive group defined over $F$ endowed with an $F$-morphism $f: H\rightarrow G$ such that the induced morphism $H_{der}\rightarrow G_{der}$ on the derived groups is a central…

Number Theory · Mathematics 2019-04-24 Jean-Pierre Labesse , Joachim Schwermer

In this paper, we establish the theory of local newforms for irreducible tempered generic representations of unramified odd unitary groups over a non-archimedean local field. For the proof, we prove an analogue of the fundamental lemma for…

Number Theory · Mathematics 2022-06-22 Hiraku Atobe , Masao Oi , Seidai Yasuda

We show that the irreducible components of any moduli space of semistable representations of a special biserial algebra are always isomorphic to products of projective spaces of various dimensions. This is done by showing that irreducible…

Representation Theory · Mathematics 2020-03-03 Andrew T. Carroll , Calin Chindris , Ryan Kinser , Jerzy Weyman

In this article, we introduce the singular twin monoid and its corresponding group, constructed from both algebraic and topological perspectives. We then classify all complex homogeneous $2$-local representations of this constructed group.…

Representation Theory · Mathematics 2026-02-05 Mohamad N. Nasser , Nafaa Chbili

We construct all cuspidal l-modular representations of a unitary group in three variables attached to an unramified extension of local fields of odd residual characteristic p with l\neq p. We describe the l-modular principal series and show…

Representation Theory · Mathematics 2016-01-20 Robert Kurinczuk

The endoscopic classification via the stable trace formula comparison provides certain character relations between irreducible cuspidal automorphic representations of classical groups and their global Arthur parameters, which are certain…

Number Theory · Mathematics 2019-11-20 Dihua Jiang , Lei Zhang

This paper is concerned with representations of split orthogonal and quasi-split unitary groups over a nonarchimedean local field which are not generic, but which support a unique model of a different kind, the generalized Bessel model. The…

Representation Theory · Mathematics 2009-09-25 Solomon Friedberg , David Goldberg

We discuss progress towards the classification of irreducible admissible representations of reductive groups over non-archimedean local fields and the local Langlands correspondence. We also state some (partly conjectural) compatibility…

Representation Theory · Mathematics 2022-02-03 Tasho Kaletha