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We compare several definitions of the Galois group of a linear difference equation that have arisen in algebra, analysis and model theory and show, that these groups are isomorphic over suitable fields. In addition, we study properties of…

Classical Analysis and ODEs · Mathematics 2007-05-23 Zoé Chatzidakis , Charlotte Hardouin , Michael F. Singer

A Weyl group W is a union of strata (certain subsets which are unions of conjugacy classes) which are the nonempty fibres of a map from W to the set of irreducible representations of W. We give an explicit description of strata in terms of…

Representation Theory · Mathematics 2026-02-26 G. Lusztig

We present a generalization of the Newton-Girard identities, along with some applications. As an addendum, we collect many evaluations of symmetric polynomials to which these identities apply.

Number Theory · Mathematics 2019-01-25 Tanay Wakhare

In this note we show that the known relation between double groupoids and matched pairs of groups may be extended, or seems to extend, to the triple case. The references give some other occurrences of double groupoids.

Category Theory · Mathematics 2011-04-12 Ronald Brown

This paper studies how differentiable representations of certain subsemigroups of the Weyl-Heisenberg group may be obtained in suitably constructed rigged Hilbert spaces. These semigroup representations are induced from a continuous unitary…

Mathematical Physics · Physics 2015-06-26 S. Wickramasekara , A. Bohm

A presentation by generators and relations of the $n$th symmetric power $B$ of a commutative algebra $A$ over a field of characteristic zero or greater than $n$ is given. This is applied to get information on a minimal homogeneous…

Commutative Algebra · Mathematics 2016-12-02 M. Domokos

Instead of the Ginsparg-Wilson relation only generalized chiral symmetry is required. The resulting much larger class of Dirac operators for massless fermions is investigated and a general construction for them is given. It is also shown…

High Energy Physics - Lattice · Physics 2009-11-07 Werner Kerler

We discuss representations of monogenic functions over very regular groups.

Analysis of PDEs · Mathematics 2025-02-13 Tove Dahn

The conjugation action of the complex orthogonal group on the polynomial functions on $n \times n$ matrices gives rise to a graded algebra of invariant polynomials. A spanning set of this algebra is in bijective correspondence to a set of…

Representation Theory · Mathematics 2020-07-20 Alison Becker

In the theory of C*-algebras, the Weyl groups were defined for the Cuntz algebras and graph algebras by Cuntz and Conti et al. respectively. In this paper, we introduce and investigate the Weyl groups of groupoid C*-algebras as a natural…

Operator Algebras · Mathematics 2025-01-30 Fuyuta Komura

By the theorems of Cayley and Vagner-Preston, the full transformation monoids and the symmetric inverse monoids play analogous roles in the theory of monoids and inverse monoids, as the symmetric groups do in the theory of groups. Every…

Group Theory · Mathematics 2026-05-25 Thomas Aird , James D. Mitchell , Murray T. Whyte

We describe an linear representation for Abel-Grassmann groups. As a consequence, we obtain or improve many previous results. In particular, enumeration of Abel-Grassmann groups up to isomorphism is obtained for orders <512.

Group Theory · Mathematics 2014-12-01 David Stanovsky

Following a preceding paper of Tarasov and the second author, we define and study a new structure, which may be regarded as the dynamical analogue of the Weyl group for Lie algebras and of the quantum Weyl group for quantized enveloping…

Quantum Algebra · Mathematics 2007-05-23 Pavel Etingof , Alexander Varchenko

We relate the linear asymptotic representation theory of the symmetric groups to its spin counterpart. In particular, we give explicit formulas which express the normalized irreducible spin characters evaluated on a strict partition $\xi$…

Combinatorics · Mathematics 2020-03-03 Sho Matsumoto , Piotr Śniady

We introduce a new class of graded rings extending the class of generalized Weyl algebras. These rings are orders in crossed products of the most general type, and we introduce their basic structure theory. We provide an extensive list of…

Rings and Algebras · Mathematics 2007-05-23 Erna Nauwelaerts , Freddy Van Oystaeyen

Representations of a group $G$ in vector spaces over a field $K$ form a category. One can reconstruct the given group $G$ from its representations to vector spaces as the full group of monoidal automorphisms of the underlying functor. This…

High Energy Physics - Theory · Physics 2008-02-03 Bodo Pareigis

In this (partly expository) paper we show, using ideas from the theory of total positivity, how a number of properties of a semisimple group over the complex numbers can be presented purely in terms of the Weyl group. We also describe some…

Representation Theory · Mathematics 2025-09-24 G. Lusztig

Harmonic functions of the three dimensional Lie groups defined on certain manifolds related to the Lie groups themselves and carrying all their unitary representations are explicitly constructed. The realisations of these Lie groups are…

Mathematical Physics · Physics 2017-01-30 R. Campoamor-Stursberg , M. Rausch de Traubenberg

In this paper, we investigate the structure of associated groups of symmetric quandles. Among other results, we explore the relationship between the associated group of a symmetric quandle and that of its underlying quandle. We provide a…

Geometric Topology · Mathematics 2025-08-12 Toshiyuki Akita , Kakeru Shikata

A series of nonrepresentable relation algebras is constructed from groups. We use them to prove that there are continuum many subvarieties between the variety of representable relation algebras and the variety of coset relation algebras. We…

Logic · Mathematics 2025-02-12 H. Andréka , S. Givant , I. Németi