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We derive explicitly the structural properties of the $p$-adic special orthogonal groups in dimension three, for all primes $p$, and, along the way, the two-dimensional case. In particular, starting from the unique definite quadratic form…

Number Theory · Mathematics 2024-01-19 Sara Di Martino , Stefano Mancini , Michele Pigliapochi , Ilaria Svampa , Andreas Winter

Let $F$ be a local non-archimedian field of odd residue characteristic and let $G=PGL(2)$. In this paper we study an analog of irreducible cuspidal representations of the group $G(F)$ when $F$ is replaced by the field $K=F((t))$. The story…

Representation Theory · Mathematics 2026-04-14 Alexander Braverman , David Kazhdan

We begin this paper by reviewing the Langlands correspondence for unipotent representations of the exceptional group of type $G_2$ over a $p$-adic field $F$ and present it in an explicit form. Then we compute all ABV-packets, as defined in…

Representation Theory · Mathematics 2021-01-26 Clifton Cunningham , Andrew Fiori , Qing Zhang

Let F be a non-archimedean local field of odd residual characteristic. Let W be a symplectic vector space over F. It is known that there are different Weil representations of a Meteplectic covering group Mp(W). By some twisted actions, we…

Representation Theory · Mathematics 2024-01-09 Chun-Hui Wang

In 1979 Lusztig proposed a conjectural construction of supercuspidal representations of reductive p-adic groups, which is similar to the well known construction of Deligne and Lusztig in the setting of finite reductive groups. We present a…

Representation Theory · Mathematics 2012-07-26 Mitya Boyarchenko

Let $F$ be a non-archimedean local field of characteristic different from 2 and residual characteristic $p$. This paper concerns the $\ell$-modular representations of a connected reductive group $G$ distinguished by a Galois involution,…

Representation Theory · Mathematics 2024-04-05 Peiyi Cui , Thomas Lanard , Hengfei Lu

We show the existence of an L-functions of a cuspidal representation of GSp(4,A)*GSp(4,A) which has a pole of order 2 at s = 1, even for globally generic representations. However if \pi comes from GSO(4,A), then \pi? is the Weil transfer of…

Number Theory · Mathematics 2010-12-01 Bogume Jang

Higher Deligne-Lusztig representations are virtual smooth representations of parahoric subgroups in a $p$-adic group. They are natural analogs of classical Deligne-Lusztig representations of reductive groups over finite fields. The most…

Representation Theory · Mathematics 2024-10-24 Sian Nie

We compute the characters of many supercuspidal representations of reductive p-adic groups. Specifically, we deal with representations that arise via Yu's construction from data satisfying a certain compactness condition. Each character is…

Representation Theory · Mathematics 2020-07-07 Jeffrey D. Adler , Loren Spice

We define a new notion of cuspidality for representations of $\GL_n$ over a finite quotient $\Oh_k$ of the ring of integers $\Oh$ of a non-Archimedean local field $F$ using geometric and infinitesimal induction functors, which involve…

Representation Theory · Mathematics 2010-06-14 Anne-Marie Aubert , Uri Onn , Amritanshu Prasad , Alexander Stasinski

We provide a new tableau model from which one can easily deduce the characters of finite-dimensional irreducible polynomial representations of the special orthogonal group $SO_n(\mathbb{C})$. This model originates from the representation…

Combinatorics · Mathematics 2023-02-17 Hideya Watanabe

Let $F$ be a field which is, either local non archimedean, or finite, of residual charcateristic $p$ but of characteristic different from $2$. Let $W$ be a symplectic space of finite dimension over $F$. Suppose $R$ is a field of…

Representation Theory · Mathematics 2020-09-25 Justin Trias

Let $F$ be a non-Archimedean local field with the residual characteristic $p$. We construct a "good" number of smooth irreducible $\bar{\mathbf{F}}_p$-representations of $GL_2(F)$, which are supersingular in the sense of Barthel and…

Representation Theory · Mathematics 2007-05-23 Vytautas Paskunas

An explicit understanding of the (category of all smooth, complex) representations of p-adic groups provides an important tool not just within representation theory. It also has applications to number theory and other areas, and, in…

Representation Theory · Mathematics 2025-10-13 Jessica Fintzen

The Weil representation of the symplectic group associated to a finite abelian group of odd order is shown to have a multiplicity-free decomposition. When the abelian group is p-primary, the irreducible representations occurring in the Weil…

Representation Theory · Mathematics 2015-05-19 Kunal Dutta , Amritanshu Prasad

We prove the conjectural endoscopic transfer of L-packets for the local Langlands correspondence for pure inner forms of unramified p-adic groups and depth-zero parameters established by DeBacker and Reeder. More precisely, we show that…

Representation Theory · Mathematics 2019-12-19 Tasho Kaletha

A method to construct irreducible unitary representations of a hyperspecial compact subgroup of a reductive group over p-adic field with odd p is presented. Our method is based upon Cliffods theory and Weil representations over finite…

Group Theory · Mathematics 2018-05-17 Koichi Takase

Let $G$ be a real compact Lie group, such that $G=G^0\rtimes C_2$, with $G^0$ simple. Here $G^0$ is the connected component of $G$ containing the identity and $C_2$ is the cyclic group of order $2$. We give a criterion for whether an…

Representation Theory · Mathematics 2020-12-08 Jyotirmoy Ganguly , Rohit Joshi

Given a quaternionic form G of a p-adic classical group (p odd) we classify all cuspidal irreducible representations of G with coefficients in an algebraically closed field of characteristic different from p. We prove two theorems: At…

Representation Theory · Mathematics 2022-11-09 Daniel Skodlerack

Let G = SL_2(K) with K a local function field of characteristic 2. We review Artin-Schreier theory for the field K, and show that this leads to a parametrization of L-packets in the smooth dual of G. We relate this to a recent geometric…

Representation Theory · Mathematics 2013-02-26 Sergio Mendes , Roger Plymen