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In this paper, we propose a new conjecture describing the structure of the unitary dual in terms of Arthur representations for connected reductive algebraic groups defined over any non-Archimedean local field of characteristic zero. This…

Representation Theory · Mathematics 2026-02-11 Alexander Hazeltine , Dihua Jiang , Baiying Liu , Chi-Heng Lo , Qing Zhang

We prove the Kudla--Rapoport conjecture for Kr\"amer models of unitary Rapoport--Zink spaces at ramified places. It is a precise identity between arithmetic intersection numbers of special cycles on Kr\"amer models and modified derived…

Number Theory · Mathematics 2023-07-04 Qiao He , Chao Li , Yousheng Shi , Tonghai Yang

We construct relative Gromov--Witten theory with expanded degenerations in the normal crossings setting and establish a degeneration formula for the resulting invariants. Given a simple normal crossings pair $(X,D)$, we show that there…

Algebraic Geometry · Mathematics 2022-05-03 Dhruv Ranganathan

We study the compatibility of Arthur's conjecture for $R$-groups in the restriction of discrete series representations from Levi subgroups of a $p$-adic group to those of its closed subgroup having the same derived group. The compatibility…

Representation Theory · Mathematics 2022-01-14 Kwangho Choiy

We propose in this paper an approach to Breuil's conjecture on a Langlands correspondence between $p$-adic Galois representations and representations of $p$-adic Lie groups in $p$-adic topological vector spaces. We suggest that Berthelot's…

Number Theory · Mathematics 2008-02-18 King Fai Lai

This paper introduces arithmetic geometry for polynomial identity algebras using non-commutative (formal) deformation theory. Since formal deformation theory is inherently local the arithmetic and geometric results that follow give local…

Number Theory · Mathematics 2023-08-29 Daniel Larsson

For a classical group over a non-archimedean local field of odd residual characteristic p, we construct all cuspidal representations over an arbitrary algebraically closed field of characteristic different from p, as representations induced…

Representation Theory · Mathematics 2015-11-30 Robert Kurinczuk , Shaun Stevens

In this article, we investigate the variance of local $\varepsilon$-factor for a modular form with arbitrary nebentypus with respect to twisting by a quadratic character. We detect the type of the supercuspidal representation from that. For…

Number Theory · Mathematics 2020-01-17 Debargha Banerjee , Tathagata Mandal

In this article, we study admissible representations of even unitary groups over local fields, where the quadratic extension is ramified, with invariant vectors under the action of the stabilizer of a unimodular lattice and some properties…

Number Theory · Mathematics 2026-05-21 Zhuoni Chi

We provide a generalization of an algebraic linear combination for the trace of certain elliptic modular forms, and through specializing the expression at a suitable pair consisting of an elliptic curve over algebraic number fields and its…

Number Theory · Mathematics 2016-04-06 Norifumi Ojiro

We prove a summation formula for pairs of quadratic spaces following the conjectures of Braverman-Kazhdan, Lafforgue, Ng\^{o} and Sakellaridis. We also give an expression of the local factors where all the data are unramified.

Number Theory · Mathematics 2025-07-29 Miao Pam Gu

In the first part of the paper, we formulate several arithmetic transfer conjectures, which are variants of the arithmetic fundamental lemma conjecture in the presence of ramification. The ramification comes from the choice of…

Number Theory · Mathematics 2026-05-05 Chao Li , Michael Rapoport , Wei 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

For a reductive group scheme over a regular semi-local ring, we prove an equivarinat version of the Gersten conjecture. We draw some interesting consequences for the representation rings of such reductive group schemes. We also prove the…

Algebraic Geometry · Mathematics 2009-06-23 Amalendu Krishna

Let $F$ be a $p$-adic field and $E/F$ be a quadratic extension. In this paper, we prove the local converse theorem for generic representations of $\textrm{U}_{E/F}(2,2)$ if $E/F$ is unramified or the residue characteristic of $F$ is odd.…

Number Theory · Mathematics 2017-05-23 Qing Zhang

In a recent paper by M. Mantoiu and M. Ruzhansky, a global pseudo-differential calculus has been developed for unimodular groups of type I. In the present article we generalize the main results to arbitrary locally compact groups of type I.…

Functional Analysis · Mathematics 2020-08-19 M. Mantoiu , M. Sandoval

A commutative associative algebra A with an identity over the field of real numbers which has a basis, where all elements are invertible, is considered in the work. Moreover, among matrixes consisting of the structure constants of A, there…

Complex Variables · Mathematics 2020-09-29 T. M. Osipchuk

Let $E/F$ be a quadratic extension of p-adic fields. We prove that every smooth irreducible ladder representation of the group $GL_n(E)$ which is contragredient to its own Galois conjugate, possesses the expected distinction properties…

Representation Theory · Mathematics 2015-09-15 Maxim Gurevich

We study local multiplicities associated to the so-called generalized Shalika models. By establishing a local trace formula for these kind of models, we are able to prove a multiplicity formula for discrete series. As a result, we can show…

Representation Theory · Mathematics 2019-05-29 Raphaël Beuzart-Plessis , Chen Wan

The goal of this paper is to develop the combinatorics needed to understand in an explicit way the transfer between classical groups and general linear groups

Group Theory · Mathematics 2007-05-23 Colette Moeglin , Jean-Loup Waldspurger