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Recently, motivated by the theory of real local Arthur packets, making use of the wavefront sets of representations over non-Archimedean local fields $F$, Ciubotaru, Mason-Brown, and Okada defined the weak local Arthur packets consisting of…

Representation Theory · Mathematics 2023-08-21 Baiying Liu , Chi-Heng Lo

Weak Arthur packets have long been instrumental in the study of the unitary dual and automorphic spectrum of reductive Lie groups, and were recently introduced in the p-adic setting by Ciubotaru - Mason-Brown - Okada. For split odd…

Representation Theory · Mathematics 2024-04-05 Maxim Gurevich , Emile Okada

Let $G(k)$ be the split form of the simple exceptional p-adic group of type $F_4$, and let $\mathcal O = F_4(a_3)$ be the minimal distinguished nilpotent orbit. Our main result concerns the class of unipotent representations with cuspidal…

Representation Theory · Mathematics 2025-12-09 Leticia Barchini , András C. Lőrincz

We compute special unipotent Arthur packets for real reductive groups in many cases. We list the cases that lead to incomplete answers, and in those cases, provide a suitable set of representations that could lead to a complete description…

Representation Theory · Mathematics 2018-11-16 Jonathan Fernandes

This paper begins the project of defining Arthur packets of all unipotent representations for the $p$-adic exceptional group $G_2$. Here we treat the most interesting case by defining and computing Arthur packets with component group $S_3$.…

Representation Theory · Mathematics 2021-11-15 Clifton Cunningham , Andrew Fiori , Qing Zhang

We establish an explicit correspondence of certain Arthur packets between real unitary groups and $p$-adic symplectic or orthogonal groups. This allows one to compute Arthur packets of real unitary groups by translating results from the…

Representation Theory · Mathematics 2026-03-18 Taiwang Deng , Chang Huang , Bin Xu , Qixian Zhao

In this paper we construct some packets of representations which have to correspond to relatively general Arthurs packets; this is for any classical group $G$ over a p-adic field $F$. An Arthur's packet correspond to a map $\psi$ from…

Group Theory · Mathematics 2007-05-23 Colette Moeglin

This paper serves as an attempt towards the Jiang conjecture on the upper bound nilpotent orbits in the wavefront sets of representations in local Arthur packets of quasi-split classical groups, which is a natural generalization of the…

Representation Theory · Mathematics 2026-05-07 Baiying Liu , Freydoon Shahidi

This article is part of a project which consists of investigating Arthur packets for real classical groups. Our goal is to give an explicit description of these packets and to establish the multiplicity one property (which is known to hold…

Representation Theory · Mathematics 2019-01-11 Colette Moeglin , David Renard

We construct the Arthur packets for symplectic and even orthogonal similitude groups over a $p$-adic field and show that they are stable and satisfy the twisted endoscopic character relations.

Number Theory · Mathematics 2023-06-16 Bin Xu

In this paper we prove Vogan's conjecture on local Arthur packets, for Arthur parameters of $p$-adic general linear groups that are irreducible as representations of $W_F \times SL_2(\mathbb{C}) \times SL_2(\mathbb{C})$ - we refer to such…

Representation Theory · Mathematics 2022-10-11 Clifton Cunningham , Mishty Ray

In the paper we begin to explore relation between the question of unitarizability of classical p-adic groups, and Arthur packets.

Number Theory · Mathematics 2024-02-19 Marko Tadic

In this paper we study the upper bound of wavefront sets of irreducible admissible representations of connected reductive groups defined over non-Archimedean local fields of characteristic zero. We formulate a new conjecture on the upper…

Representation Theory · Mathematics 2026-05-06 Alexander Hazeltine , Baiying Liu , Chi-Heng Lo , Freydoon Shahidi

Arthur has conjectured the existence of what are now known as Arthur packets of representations of reductive algebraic groups over local and global fields. In the case of classical groups he subsequently gave a definition of these packets,…

Representation Theory · Mathematics 2022-04-23 Jeffrey Adams , Nicolás Arancibia Robert , Paul Mezo

Let $G=\mathbf{G}(\mathbb{R})$ be the group of real points of a quasi-split connected reductive algebraic group defined over $\mathbb{R}$. Assume furthermore that $G$ is a classical group (symplectic, special orthogonal or unitary). We show…

Representation Theory · Mathematics 2017-02-01 Nicolás Arancibia , Colette Moeglin , David Renard

This is a report on the progress made on a conjecture of Jiang on the upper bound nilpotent orbits in the wave front sets of representations in local Arthur packets of classical groups, which is a natural generalization of the Shahidi…

Representation Theory · Mathematics 2025-03-10 Baiying Liu , Freydoon Shahidi

In this article we propose a geometric description of Arthur packets for $p$-adic groups using vanishing cycles of perverse sheaves. Our approach is inspired by the 1992 book by Adams, Barbasch and Vogan on the Langlands classification of…

Representation Theory · Mathematics 2022-03-29 Clifton Cunningham , Andrew Fiori , Ahmed Moussaoui , James Mracek , Bin Xu

Arthur packets have been defined for pure real forms of symplectic and special orthogonal groups following two different approaches. The first approach, due to Arthur, Moeglin and Renard uses harmonic analysis. The second approach, due to…

Representation Theory · Mathematics 2026-01-14 Nicolas Arancibia Robert , Paul Mezo

We determine the number of local Arthur packets containing a certain fixed tempered representation for classical $p$-adic groups. More specifically, given a tempered extended multi-segment supported in the integers, we determine a count for…

Representation Theory · Mathematics 2026-02-16 Alexander Hazeltine , Aarya Kumar , Andrew Tung

Arthur's conjectures predict the existence of some very interesting unitary representations occurring in spaces of automorphic forms. We prove the unitarity of the "Langlands element" (i.e., the one specified by Arthur) of all unipotent…

Representation Theory · Mathematics 2021-08-05 Joseph Hundley , Stephen D. Miller
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