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We introduce the notion of wide representation of an inverse semigroup and prove that with a suitably defined topology there is a space of germs of such a representation which has the structure of an etale groupoid. This gives an elegant…

General Topology · Mathematics 2012-04-03 Dmitry Matsnev , Pedro Resende

We adapt the abstract concepts of abelianness and centrality of universal algebra to the context of inverse semigroups. We characterize abelian and central congruences in terms of the corresponding congruence pairs. We relate centrality to…

Group Theory · Mathematics 2026-02-04 Michael Kinyon , David Stanovský

We present two novel proofs of the known classification of connected affine algebraic supergroups $G$ such that $\operatorname{Rep}G$ is semisimple. The proofs are geometrically motivated, although both rely on an algebraic lemma that…

Representation Theory · Mathematics 2021-11-17 Alexander Sherman

We study solvability, nilpotency and splitting property for algebraic supergroups over an arbitrary field $K$ of characteristic $\mathrm{char}\, K \ne 2$. Our first main theorem tells us that an algebraic supergroup $\mathbb{G}$ is solvable…

Algebraic Geometry · Mathematics 2016-01-28 Akira Masuoka , Alexandr N. Zubkov

We construct new examples of non-nil algebras with any number of generators, which are direct sums of two locally nilpotent subalgebras. As all previously known examples, our examples are contracted semigroup algebras and the underlying…

Rings and Algebras · Mathematics 2007-05-23 Vesselin Drensky , Lakhdar Hammoudi

We introduce the notion of a super-representation of a quiver. For super-representations of quivers over a field of characteristic zero, we describe the corresponding (super)algebras of polynomial semi-invariants and polynomial invariants.

Representation Theory · Mathematics 2019-12-03 V. A. Bovdi , A. N. Zubkov

We prove a generalisation of the correspondence, due to Resende and Lawson--Lenz, between \'etale groupoids---which are topological groupoids whose source map is a local homeomorphisms---and complete pseudogroups---which are inverse monoids…

Category Theory · Mathematics 2020-04-22 Robin Cockett , Richard Garner

The anomalous bilinear commutation relations satisfied by the components of the Green's ansatz for paraparticles are shown to derive from the comultiplication of the paraboson or parafermion algebra. The same provides a generalization of…

Mathematical Physics · Physics 2009-10-31 C. Quesne

The algebraic structure of the Green's ansatz is analyzed in such a way that its generalization to the case of q-deformed para-Bose and para-Fermi operators is becoming evident. To this end the underlying Lie (super)algebraic properties of…

High Energy Physics - Theory · Physics 2009-10-28 T. D. Palev

We continue our study of Hilbert space representations of the Reflection Equation Algebra, again focusing on the algebra constructed from the $R$-matrix associated to the $q$-deformation of $GL(N,\mathbb{C})$ for $0<q<1$. We develop a form…

Quantum Algebra · Mathematics 2025-06-23 Stephen T. Moore

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

The problem of characterizing GKLS-generators and CP-maps with an invariant appeared in different guises in the literature. We prove two unifying results which hold even for weakly closed *-algebras: First, we show how to construct a normal…

Mathematical Physics · Physics 2023-04-21 Markus Hasenöhrl , Matthias C. Caro

We present a connection between W-algebras and Yangians, in the case of gl(N) algebras, as well as for twisted Yangians and/or super-Yangians. This connection allows to construct an R-matrix for the W-algebras, and to classify their…

Mathematical Physics · Physics 2013-05-20 C. Briot , E. Ragoucy

The p-adic local Langlands correspondence for GL_2(Q_p) is given by an exact functor from unitary Banach representations of GL_2(Q_p) to representations of the absolute Galois group G_{Q_p} of Q_p. We prove, using characteristic 0 methods,…

Number Theory · Mathematics 2013-10-09 Pierre Colmez , Gabriel Dospinescu , Vytautas Paskunas

We introduce the notion of a generalized representation of a Jordan algebra with unit. The greneralized representation has the following properties: (1) Usual representations and Jacobson representations correspond to special cases of…

Representation Theory · Mathematics 2007-05-23 Issai Kantor , Gregory Shpiz

This work begins the process of using the decomposition of the diagonal as a tool for studying the rationality of invariant fields of finite groups $G$. Our ground field must be characteristic 0 because of the use we make of Bertini…

Algebraic Geometry · Mathematics 2025-08-28 David J Saltman

We establish a relative Riemann-Hilbert correspondence for Alexander complexes (also known as Sabbah specialization complexes) by using relative regular holonomic $\mathscr D$-modules in an equivariant way, which particularly gives a…

Algebraic Geometry · Mathematics 2026-01-29 Lei Wu

We give a presentation of a finite crystallographic reflection group in terms of an arbitrary seed in the corresponding cluster algebra of finite type and interpret the presentation in terms of companion bases in the associated root system.

Group Theory · Mathematics 2020-12-21 Michael Barot , Bethany Marsh

We determine the non-abelian composition factors of the finite groups with Sylow normalizers of odd order. As a consequence, among others, we prove the McKay conjecture and the Alperin weight conjecture for these groups.

Group Theory · Mathematics 2016-02-25 Robert M. Guralnick , Gabriel Navarro , Pham Huu Tiep

The Springer correspondence makes a link between the characters of a Weyl group and the geometry of the nilpotent cone of the corresponding semisimple Lie algebra. In this article, we consider a modular version of the theory, and show that…

Representation Theory · Mathematics 2014-10-07 Daniel Juteau