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This paper contains a complete description of classes of the unitary equivalence of the admissible representations of infinite-dimensional classic matrix groups paper.

funct-an · Mathematics 2008-02-03 N. I. Nessonov

We investigate the rate of growth of the function of n which counts the number of complex irreducible representations of a fixed group of degree less than or equal to n. The emphasis is on linear groups, especially compact real and p-adic…

Group Theory · Mathematics 2007-05-23 Michael Larsen , Alexander Lubotzky

We construct $(2n)^2\times (2n)^2$ unitary braid matrices $\hat{R}$ for $n\geq 2$ generalizing the class known for $n=1$. A set of $(2n)\times (2n)$ matrices $(I,J,K,L)$ are defined. $\hat{R}$ is expressed in terms of their tensor products…

Quantum Algebra · Mathematics 2008-11-26 B. Abdesselam , A. Chakrabarti , V. K. Dobrev , S. G. Mihov

We prove that all linear Lie groups satisfying the conditions listed in the title are finite extensions of commutative Lie groups.

Representation Theory · Mathematics 2025-10-14 A. I. Shtern

In this paper, we will develop a family of braid representations of Artin groups of type B from braided vector spaces, and identify the homology of these groups with these coefficients with the cohomology of a specific bimodule over a…

Algebraic Topology · Mathematics 2024-02-20 Anh Trong Nam Hoang

The reduced Burau representation $V_n$ of the braid group $B_n$ is obtained from the action of $B_n$ on the homology of an infinite cyclic cover of the disc with $n$ punctures. The group homology $H_*(B_n;V_n)$ of braid groups with…

Geometric Topology · Mathematics 2017-07-24 Weiyan Chen

We characterize groups with Guoliang Yu's property A (i.e., exact groups) by the existence of a family of uniformly bounded representations which approximate the trivial representation.

Group Theory · Mathematics 2013-12-17 Kate Juschenko , Piotr W. Nowak

A braid representation is a monoidal functor from the braid category $\mathsf{B}$, for example given by a solution to the constant Yang-Baxter equation. Given a monoidal category $\mathsf{C}$ with $ob(\mathsf{C})=\mathbb{N}$, a rank-$N$…

Quantum Algebra · Mathematics 2023-03-02 Paul Martin , Eric C. Rowell

The reduced Burau representation $V_n$ of the braid group $B_n$ is obtained from the action of $B_n$ on the homology of an infinite cyclic cover of the $n$-punctured disc. In this note, we calculate $H_*(B_n;V_n)$ as a module over the…

Geometric Topology · Mathematics 2015-06-22 Weiyan Chen

Complex braid groups are the natural generalizations of braid groups associated to arbitrary (finite) complex reflection groups. We investigate several methods for computing the homology of these groups. In particular, we get the Poincar\'e…

Algebraic Topology · Mathematics 2010-11-22 Filippo Callegaro , Ivan Marin

We characterize all simple unitarizable representations of the braid group $B_3$ on complex vector spaces of dimension $d \leq 5$. In particular, we prove that if $\sigma_1$ and $\sigma_2$ denote the two generating twists of $B_3$, then a…

Representation Theory · Mathematics 2007-05-23 Imre Tuba

We classify the automorphic representations (over number fields) and the irreducible admissible representations (over local fields) of unitary groups which are not quasi-split, under the assumption that the same is known for quasi-split…

Number Theory · Mathematics 2014-12-04 Tasho Kaletha , Alberto Minguez , Sug Woo Shin , Paul-James White

We study irreducible unitary \reps of $U_q(SO(2,1))$ and $U_q(SO(2,3))$ for $q$ a root of unity, which are finite dimensional. Among others, unitary \reps corresponding to all classical one-particle representations with integral weights are…

q-alg · Mathematics 2009-10-30 Harold Steinacker

In the paper we give a survey on braid groups and subjects connected with them. We start with the initial definition, then we give several interpretations as well as several presentations of these groups. Burau presentation for the pure…

Group Theory · Mathematics 2012-02-21 V. V. Vershinin

It is shown that for suitable roots of unity, there exist finite--dimensional unitary representations of $U_q(so(2,3))$ corresponding to all classical one-particle representations with (half)integer spin, with the correct low-energy limit.…

q-alg · Mathematics 2007-05-23 Harold Steinacker

We construct extended Weil representations of unitary groups over finite fields geometrically, and show that they are Shintani lifts for Weil representations.

Representation Theory · Mathematics 2025-01-14 Naoki Imai , Takahiro Tsushima

In this paper we give new presentations of the braid groups and the pure braid groups of a closed surface. We also give an algorithm to solve the word problem in these groups, using the given presentations.

Geometric Topology · Mathematics 2007-05-23 Juan Gonzalez-Meneses

We compute the continuous bounded cohomology of the full automorphism groups of regular trees in all positive degrees, with coefficients arising from any irreducible continuous unitary representations. To the author's knowledge, this seems…

Group Theory · Mathematics 2026-01-08 Cunyuan Zhao

For non-abelian simple objects in a unitary modular category, the density of their braid group representations, the #P-hard evaluation of their associated link invariants, and the BQP-completeness of their anyonic quantum computing models…

Quantum Algebra · Mathematics 2015-06-15 Matthew B. Hastings , Chetan Nayak , Zhenghan Wang

The surface singular braid monoid corresponds to marked graph diagrams of knotted surfaces in braid form. In a quest to resolve linearity problem for this monoid, we will show that if it is defined on at least two or at least three strands,…

Geometric Topology · Mathematics 2019-07-10 Michal Jablonowski