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Related papers: Raising nilpotent orbits in wave-front sets

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The wave-front set for an irreducible admissible representation of a $p$-adic reductive group is the set of maximal nilpotent orbits which appear in the local character expansion. By M\oe glin-Waldspurger, they are also the maximal…

Representation Theory · Mathematics 2025-10-22 Cheng-Chiang Tsai

We study the wave-front set of an element in a $p$-adic reductive Lie algebra (for $p\gg\operatorname{rank}$), namely the set of maximal nilpotent orbits appearing in its Shalika germ expansion. By adapting an algorithm of Waldspurger that…

Representation Theory · Mathematics 2023-11-15 Cheng-Chiang Tsai

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

Let $G$ be a nilpotent, connected, simply connected Lie group with Lie algebra $\mathfrak g$, and $\pi$ a unitary representation of $G$. The goal is to prove that the wave front set of $\pi$ coincides with the asymptotic cone of the orbital…

Representation Theory · Mathematics 2024-09-19 Julia Budde , Tobias Weich

This paper is about nilpotent orbits of reductive groups over local non-Archimedean fields. In this paper we will try to identify for which groups there are only finitely many nilpotent orbits, for which groups the nilpotent orbits are…

Representation Theory · Mathematics 2015-09-14 Julius Witte

In \cite{JZ1}, D. Jiang and L. Zhang proposed a conjecture which related the wavefront sets and the descent method in the local fields case. Recently, in \cite{JLZ}, they and D. Liu define the arithmetic wavefront set of certain irreducible…

Representation Theory · Mathematics 2022-10-25 Zhifeng Peng , Zhicheng Wang

Let $(\pi,X)$ be a depth-$0$ admissible smooth complex representation of a $p$-adic reductive group that splits over an unramified extension. In this paper we develop the theory necessary to study the wavefront set of $X$ over a maximal…

Representation Theory · Mathematics 2024-04-15 Emile Okada

For an irreducible smooth representation of a connected reductive $p$-adic group, two important associated invariants are the wavefront set and the (partly conjectural) Langlands parameter. While a wavefront set consists of $p$-adic…

Representation Theory · Mathematics 2025-08-26 Dan Ciubotaru , Ju-Lee Kim

Let G be a group SO(2n+1) defined over a p-adic field. We compute the wave front set of the anti-tempered irreducible representations of G(F) which are of unipotent reduction. It is the orthogonal orbit dual to the symplectic orbit…

Representation Theory · Mathematics 2018-08-08 Jean-Loup Waldspurger

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

In this paper it is shown that the wave front set of a direct integral of singular, irreducible representations of a real, reductive algebraic group is contained in the singular set. Combining this result with the results of the first paper…

Representation Theory · Mathematics 2017-05-16 Benjamin Harris

A parametrization of irreducible representations associated with a regular adjoint orbit of a classical group over finite quotient rings of the ring of integer of a non-dyadic non-archimedean local field is presented. The parametrization is…

Number Theory · Mathematics 2020-09-01 Koichi Takase

For local non-archimedean fields $k$ of sufficiently large residual characteristic, we explicitly parametrize and count the rational nilpotent adjoint orbits in each algebraic orbit of orthogonal and special orthogonal groups. We separately…

Group Theory · Mathematics 2019-10-14 Tobias Bernstein , Jia-Jun Ma , Monica Nevins , Jit Wu Yap

We discuss progress towards the classification of irreducible admissible representations of reductive groups over non-archimedean local fields and the local Langlands correspondence. We also state some (partly conjectural) compatibility…

Representation Theory · Mathematics 2022-02-03 Tasho Kaletha

We study the quasi-admissibility and raisablility of some nilpotent orbits of a covering group. In particular, we determine the degree of the cover such that a given split nilpotent orbit is quasi-admissible and non-raisable. The speculated…

Representation Theory · Mathematics 2023-07-04 Fan Gao , Baiying Liu , Wan-Yu Tsai

Let G be a special orthogonal group SO(2n+1) defined over a p-adic field F. Let $\pi$ be an admissible irreducible representation of G(F) which is tempered and of unipotent reduction. We prove that $\pi$ has a wave front set. In some…

Representation Theory · Mathematics 2019-04-03 Jean-Loup Waldspurger

In this paper I explore the relationship between regular functions associated to local systems on nilpotent orbits and unipotent representations in the complex groups.

Representation Theory · Mathematics 2008-10-06 Dan Barbasch

In this paper, we construct and classify the special unipotent representations of a real reductive group attached to the principal nilpotent orbit. We give formulas for the $\mathbf{K}$-types, associated varieties, and Langlands parameters…

Representation Theory · Mathematics 2020-09-25 Lucas Mason-Brown

Given a nilpotent orbit O of a real, reductive algebraic group, a necessary condition is given for the existence of a tempered representation pi such that O occurs in the wave front cycle of pi. The coefficients of the wave front cycle of a…

Representation Theory · Mathematics 2015-05-05 Benjamin Harris

We characterize those regular, holomorphic or formal maps into the orbit space $V/G$ of a complex representation of a finite group $G$ which admit a regular, holomorphic or formal lift to the representation space $V$. In particular, the…

Algebraic Geometry · Mathematics 2008-05-05 Andreas Kriegl , Mark Losik , Peter W. Michor , Armin Rainer
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