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For metaplectic groups over a local field of characteristic zero, we define the Arthur packet attached to any Arthur parameter $\psi$ as a multi-set of unitary genuine irreducible representations, characterized by endoscopic character…

Representation Theory · Mathematics 2024-11-14 Wen-Wei Li

Let G be an even orthogonal or unitary group over a number field. Based on the same observation used in arXiv:1705.10106, we prove the Arthur's multiplicity formula for the generic part of the automorphic discrete spectrum of G by using the…

Number Theory · Mathematics 2024-10-22 Rui Chen , Jialiang Zou

In this article, we explicitly construct local Arthur packets for metaplectic groups over non-Archimedean local fields of characteristic zero. Our construction is a generalization of Atobe's construction of local Arthur packets for…

Representation Theory · Mathematics 2026-04-28 Jiahe Chen

The Adams conjecture states that the local theta correspondence sends a local Arthur packet to another local Arthur packet. M{\oe}glin confirmed the conjecture when lifting to groups of sufficiently high rank and also showed that it fails…

Number Theory · Mathematics 2024-03-27 Alexander Hazeltine

The Adams conjecture predicts that the local theta correspondence should respect Arthur packets. In this paper, we revisit the Adams conjecture for the symplectic--even orthogonal dual pair. Our results provide a precise description of all…

Representation Theory · Mathematics 2026-02-20 Petar Bakic , Marcela Hanzer

In this paper, for symplectic and split odd special orthogonal groups, we develop an account of theory on the intersection problem of local Arthur packets. Specifically, following Atobe's reformulation on M{\oe}glin's construction of local…

Representation Theory · Mathematics 2024-04-16 Alexander Hazeltine , Baiying Liu , Chi-Heng Lo

We provide a construction of local and automorphic non-tempered Arthur packets of the group SO(3,2) and its inner form SO(4,1) associated with a certain Arthur's parameter and prove a multiplicity formula. We further study the restriction…

Number Theory · Mathematics 2014-09-17 Nadya Gurevich , Dani Szpruch

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

Using theta correspondence, we obtain a classification of irreducible representations of an arbitrary even orthogonal group (i.e. the local Langlands correspondence) by deducing it from the local Langlands correspondence for symplectic…

Representation Theory · Mathematics 2021-09-09 Rui Chen , Jialiang Zou

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

Using exceptional theta correspondences we construct a family of Arthur packets for the exceptional group of type D4, and establish the global Arthur multiplicity formula.

Number Theory · Mathematics 2022-12-20 Wee Teck Gan , Gordan Savin

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 be a special orthogonal group or an inner form of a symplectic group over a number field F such that there exists a non-empty set S of real places of F at which G has discrete series and outside of which G is quasi-split. We prove…

Number Theory · Mathematics 2015-10-29 Olivier Taïbi

In this paper, following Arthur's ideas, we rework the process of constructing the anti-tempered local Arthur packets for quasi-split classical groups and their pure inner forms. In particular, we present explicit examples illustrating…

Number Theory · Mathematics 2024-08-22 Baiying Liu , Chi-Heng Lo , Freydoon Shahidi

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

Using the theta correspondence, we extend the classification of irreducible representations of quasi-split unitary groups (the so-called local Langlands correspondence, which was established in an early paper of Mok) to non quasi-split…

Representation Theory · Mathematics 2021-10-12 Rui Chen , Jialiang Zou

In this paper, we reformulate Moeglin's explicit construction of local A-packets of split odd special orthogonal groups and symplectic groups. By this reformulation together with results of the previous paper with Minguez, we can compute…

Representation Theory · Mathematics 2022-04-26 Hiraku Atobe

In this paper, applying the intersection theory of local Arthur packets, for symplectic and split odd special orthogonal groups G_n, we give the first complete proof of the enhanced Shahidi conjecture on generic representations in local…

Representation Theory · Mathematics 2024-06-21 Alexander Hazeltine , Baiying Liu , Chi-Heng Lo

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

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
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