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In this paper, using computations done through the LiE software, we compare the tensor product of irreducible selfdual representations of the special linear group with those of classical groups to formulate some conjectures relating the…

Representation Theory · Mathematics 2020-03-24 Dipendra Prasad , Vinay Wagh

An $(m,n)$-branched twist spin is a fibered $2$-knot in $S^4$ which is determined by a $1$-knot $K$ and coprime integers $m$ and $n$. For a $1$-knot, Lin proved that the number of irreducible $SL(2,\mathbb{C})$-metabelian representations of…

Geometric Topology · Mathematics 2018-05-22 Mizuki Fukuda

We survey several notions of Mackey functors and biset functors found in the literature and prove some old and new theorems comparing them. While little here will surprise the experts, we draw a conceptual and unified picture by making…

Representation Theory · Mathematics 2021-07-21 Ivo Dell'Ambrogio

The multiplicities of the decomposition of the product of an arbitrary number $n$ of spin $s$ states into irreducible $SU(2)$ representations are computed. Two complementary methods are presented, one based on random walks in representation…

High Energy Physics - Theory · Physics 2020-03-06 Alexios P. Polychronakos , Konstantinos Sfetsos

Let $G$ be a finite group of Lie type and $\ell$ be a prime which is not equal to the defining characteristic of $G$. In this note we discuss some open problems concerning the $\ell$-modular irreducible representations of $G$. We also…

Representation Theory · Mathematics 2011-07-04 Meinolf Geck

Let $\Gamma$ be a non-commutative free group on finitely many generators. In a previous work two of the authors have constructed the class of multiplicative representations of $\Gamma$ and proved them irreducible as representation of…

Representation Theory · Mathematics 2015-01-14 M. Gabriella Kuhn , Sandra Saliani , Tim Steger

We present a powerful theorem for proving the irreducibility of tempered unitary representations of the free group.

Group Theory · Mathematics 2019-05-09 Waldemar Hebisch , M. Gabriella Kuhn , Tim Steger

Given a subgroup H of a finite group G, we begin a systematic study of the partial representations of G that restrict to global representations of H. After adapting several results from [DEP00] (which correspond to the case where H is…

Representation Theory · Mathematics 2022-05-25 Michele D'Adderio , William Hautekiet , Paolo Saracco , Joost Vercruysse

This paper gives a complete classification of the unitary irreducible spherical representations of split real and p-adic groups. The results were obtained around 2000, the changes to the new version are expository.

Representation Theory · Mathematics 2009-10-22 Dan Barbasch

In this paper, we study representations of the rational Cherednik algebra associated to the complex reflection group $G_4$. In particular, we classify the irreducible finite dimensional representations and compute their characters.

Representation Theory · Mathematics 2016-07-13 Yi Sun

We classify and construct all irreducible positive energy representations of the loop group of a compact, connected and simple Lie group and show that they admit an intertwining action of Diff(S^{1}).

Quantum Algebra · Mathematics 2009-11-07 Valerio Toledano-Laredo

In this paper we study the determinant of irreducible representations of the generalized symmetric groups $\mathbb{Z}_r \wr S_n$. We give an explicit formula to compute the determinant of an irreducible representation of $\mathbb{Z}_r \wr…

Representation Theory · Mathematics 2020-10-09 Amrutha P , T. Geetha

We present two uncountable families of finitely generated residually finite groups all having the same profinite completion. One consists of soluble groups, the other of branch groups.

Group Theory · Mathematics 2021-07-30 Nikolay Nikolov , Dan Segal

It is proved that certain types of modular cusp forms generate irreducible automorphic representation of the underlying algebraic group. Analogous archimedean and non-archimedean local statements are also given.

Representation Theory · Mathematics 2011-05-27 Hiro-aki Narita , Ameya Pitale , Ralf Schmidt

We obtain a description of the irreducible representation algebra of the alternating group of degree four over the ring of 2-adic integers.

Group Theory · Mathematics 2010-10-07 V. ~Bovdi , V. ~Rudko

We construct examples of finitely generated decidable group presentations that satisfy certain combinations of solvability for the word problem, solvability for the bounded word problem, and computablity for the Dehn function. We prove that…

Group Theory · Mathematics 2013-01-16 Desmond Cummins

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

In this paper the author finds explicitly all finite-dimensional irreducible representations of a series of finite permutation groups that are homomorphic images of Artin braid group.

Representation Theory · Mathematics 2010-02-23 Valentin Vankov Iliev

Let $G$ be a locally compact totally disconnected topological group. Under a necessary mild assumption, we show that the irreducible unitary representations of $G$ are uniformly admissible if and only if the irreducible smooth…

Representation Theory · Mathematics 2018-10-16 Uriya A. First , Thomas Rüd

We study irreducible representations of a class of quantum spheres, quotients of quantum symplectic spheres.

Quantum Algebra · Mathematics 2022-05-20 Francesco D'Andrea , Giovanni Landi