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In this paper, for quasi-split classical groups over p-adic fields, we determine the L-packets consisting of simple supercuspidal representations and their corresponding L-parameters, under the assumption that p is not equal to 2. The key…

Number Theory · Mathematics 2021-11-12 Masao Oi

We give a modification of Yu's construction of supercuspidal representations of a connected reductive group over a non-archimedean local field. This modification restores the validity of certain key intertwining property claims made by Yu,…

Representation Theory · Mathematics 2021-09-07 Jessica Fintzen , Tasho Kaletha , Loren Spice

Kaletha constructs $L$-packets for supercuspidal $L$-parameters of tame $p$-adic groups. These $L$-packets consist entirely of supercuspidal representations, which are explicitly described. Using the explicit descriptions, we show that…

Representation Theory · Mathematics 2025-09-05 Adèle Bourgeois , Paul Mezo

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

We establish the endoscopic character identity for bounded $A$-packets of non-quasisplit even special orthogonal groups, with respect to elliptic endoscopic triples. The proof reduces the non-quasisplit case to the quasisplit case and the…

Representation Theory · Mathematics 2026-04-15 Hao Peng

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 this paper we gives the Langlands parameters of Langlands' packets of discrete series using the twisted endoscopy as explained by Arthur; this holds for orthogonal, symplectic, unitary and G-Spin groups and gives the most simple proof…

Representation Theory · Mathematics 2012-12-24 Colette Moeglin

We provide an explicit construction of the local Langlands correspondence for general tamely-ramified reductive p-adic groups and a class of wildly ramified Langlands parameters. Furthermore, we verify that our construction satisfies the…

Representation Theory · Mathematics 2012-09-11 Tasho Kaletha

Given a quasi-split connected reductive $\mathbb{R}$-group $G$ and a finite group $A$ acting on $G$ by $\mathbb{R}$-automorphisms that preserve an $\mathbb{R}$-pinning, we construct for each discrete $L$-parameter for $G$ a corresponding…

Representation Theory · Mathematics 2026-05-11 Tasho Kaletha , Paul Mezo

We show that $L$-packets of toral supercuspidal representations arising from unramified maximal tori of $p$-adic groups are realized by Deligne--Lusztig varieties for parahoric subgroups. We prove this by exhibiting a direct comparison…

Representation Theory · Mathematics 2021-05-14 Charlotte Chan , Masao Oi

We construct an endoscopic decomposition for local L-packets associated to irreducible cuspidal Deligne-Lusztig representations. Moreover, the obtained decomposition is compatible with inner twistings.

Representation Theory · Mathematics 2007-05-23 David Kazhdan , Yakov Varshavsky

We classify what we call ``typically almost symmetric'' depth zero supercuspidal representations of classical groups into L-packets. Our main results resolve an ambiguity in the paper of Lust-Stevens \cite{Lust-Stevens} in this case, where…

Representation Theory · Mathematics 2023-12-08 Geo Kam-Fai Tam

We formulate a conjecture on local geometric Langlands for supercuspidal representations using Yu's data and Feigin-Frenkel isomorphism. We refine our conjecture for a large family of regular supercuspidal representations defined by…

Representation Theory · Mathematics 2025-06-23 Lingfei Yi

Let F be a non-archimedean local field and let G be a connected reductive group defined over F. We assume that G splits over a tame extension of F and that the residual characteristic p does not divide the order of the Weyl group. To each…

Representation Theory · Mathematics 2021-02-15 Tasho Kaletha

For a quasi-split classical group over a p-adic field with sufficiently large residual characteristic, we prove that the maximum of depth of representations in each L-packet equals the depth of the corresponding L-parameter. Furthermore,…

Number Theory · Mathematics 2018-07-24 Masao Oi

Let $\mathbf{G}$ be an unramified quasi-split unitary group over a p-adic field of odd residual characteristic. The goal of this paper is to describe the supercuspidal representations within certain L-packets of $\mathbf{G}$, which are…

Representation Theory · Mathematics 2015-12-29 Kam Fai Tam

We construct a pinning-normalized local Langlands correspondence for depth-zero supercuspidal representations of a connected reductive group over a non-archimedean local field. After fixing a pinned splitting of the quasi-split inner form,…

Representation Theory · Mathematics 2026-05-15 Manish Mishra

The local intertwining relation is an identity that gives precise information about the action of normalized intertwining operators on parabolically induced representations. We prove several instances of the local intertwining relation for…

Number Theory · Mathematics 2025-07-28 Hiraku Atobe , Wee Teck Gan , Atsushi Ichino , Tasho Kaletha , Alberto Mínguez , Sug Woo Shin

We construct the local Langlands correspondence of essentially unipotent supercuspidal representations under the framework of rigid inner forms and prove a certaion functoriality and compatibilities. This result is stronger than the…

Representation Theory · Mathematics 2026-05-20 Amoru Fujii

For a classical group over a non-archimedean local field of odd residual characteristic p, we prove that two cuspidal types, defined over an algebraically closed field C of characteristic different from p, intertwine if and only if they are…

Representation Theory · Mathematics 2020-09-01 Robert Kurinczuk , Daniel Skodlerack , Shaun Stevens
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