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In this article, the two-parameter quantum Heisenberg enveloping algebra, which serves as a model for certain quantum generalized Heisenberg algebras, have been studied at roots of unity. In this context, the quantum Heisenberg enveloping…

Representation Theory · Mathematics 2024-02-07 Sanu Bera , Sugata Mandal , Soumendu Nandy

In this work, we study multiplicity-free induced representations of finite groups. We analyze in great detail the structure of the Hecke algebra corresponding to the commutant of an induced representation and then specialize to the…

Representation Theory · Mathematics 2024-04-05 Tullio Ceccherini-Silberstein , Fabio Scarabotti , Filippo Tolli

In this work the description up to isomorphism of complex naturally graded quasi-filiform Zinbiel algebras is obtained.

Rings and Algebras · Mathematics 2008-05-21 J. Q. Adashev , A. Kh. Khudoyberdiyev , B. A. Omirov

This paper deals with the classification of Leibniz central extensions of a naturally graded filiform Lie algebra. We choose a basis with respect to that the table of multiplication has a simple form. In low dimensional cases isomorphism…

Rings and Algebras · Mathematics 2010-01-12 I. S. Rakhimov , Munther A. Hassan

We define a subgroup of the universal sofic group, obtained as the normaliser of a separable abelian subalgebra. This subgroup can be obtained as an extension by the group of automorphisms on a standard probability space. We show that each…

Functional Analysis · Mathematics 2019-11-06 Matteo Cavaleri , Radu B. Munteanu , Liviu Paunescu

Here we construct spaces of coinvariants for Heisenberg vertex algebras on abelian varieties and show that these globalize to twisted $\mathscr{D}$-modules on the moduli space of abelian varieties. Remarkably, we recover the standard…

Algebraic Geometry · Mathematics 2026-04-02 Nicola Tarasca

We prove a variety results on tensor product factorizations of finite dimensional Hopf algebras (more generally Hopf algebras satisfying chain conditions in suitable braided categories). The results are analogs of well-known results on…

Rings and Algebras · Mathematics 2016-02-24 Marc Keilberg , Peter Schauenburg

The graded Hecke algebra for a finite Weyl group is intimately related to the geometry of the Springer correspondence. A construction of Drinfeld produces an analogue of a graded Hecke algebra for any finite subgroup of GL(V). This paper…

Group Theory · Mathematics 2007-05-23 Arun Ram , Anne V. Shepler

The class of finitely presented algebras over a field $K$ with a set of generators $a_{1},..., a_{n}$ and defined by homogeneous relations of the form $a_{1}a_{2}... a_{n} =a_{\sigma (1)} a_{\sigma (2)} ... a_{\sigma (n)}$, where $\sigma$…

Rings and Algebras · Mathematics 2009-04-17 Ferran Cedo , Eric Jespers , Jan Okninski

Leibniz algebras are non-antisymmetric generalizations of Lie algebras that have attracted substantial interest due to their close relation with the latter class. A Leibniz algebra $A$ is called perfect if it coincides with its derived…

Rings and Algebras · Mathematics 2025-09-09 Nikolaos Panagiotis Souris

We give a complete description of finite dimensional selfinjective algebras over an algebraically closed field whose Auslander-Reiten quiver admits a generalized standard family of quasi-tubes maximally saturated by simple and projective…

Representation Theory · Mathematics 2018-02-14 Alicja Jaworska-Pastuszak , Marta Kwiecień , Andrzej Skowroński

We describe the graded characters and Hilbert functions of certain graded artinian Gorenstein quotients of the polynomial ring which are also representations of the symmetric group. Specifically, we look at those algebras whose socles are…

Commutative Algebra · Mathematics 2016-03-22 Anthony V. Geramita , Andrew H. Hoefel , David L. Wehlau

We give a simplified complete proof for the classification of the selfinjective representation-finite algebras of finite dimension over an algebraically closed field. We explain the relations between the two different approaches and also to…

Representation Theory · Mathematics 2023-05-30 Klaus Bongartz

We classify pointed Hopf algebras with finite Gelfand-Kirillov dimension, which are domains, whose groups of group-like elements are finitely generated and abelian, and whose infinitesimal braidings are positive.

Quantum Algebra · Mathematics 2007-05-23 N. Andruskiewitsch , H. -J. Schneider

It is shown that universal algebras that are injective in their equational classes are characterized by internal property that can be called completeness. We define universal algebra $A$ as complete (closed to simple extensions) if for each…

Commutative Algebra · Mathematics 2021-12-14 Pavlo Dzikovskyi

We study the notion of fundamental group in the framework of descent-exact homological categories. This setting is sufficiently wide to include several categories of "algebraic" nature such as the almost abelian categories, the semi-abelian…

Category Theory · Mathematics 2016-04-13 Mathieu Duckerts-Antoine

We establish relations between representation dimensions of two algebras connected by a Frobenius bimodule or extension. Consequently, upper bounds and equality formulas for representation dimensions of group algebras, symmetric separably…

Representation Theory · Mathematics 2020-08-13 Changchang Xi

It is shown that the *-algebra of all (closed densely defined linear) operators affiliated with a finite type I von Neumann algebra admits a unique center-valued trace, which turns out to be, in a sense, normal. It is also demonstrated that…

Operator Algebras · Mathematics 2017-05-26 Piotr Niemiec , Adam Wegert

For the coordinate algebras of connected affine algebraic groups, we explore the problem of finding a presentation by generators and relations canonically determined by the group structure.

Algebraic Geometry · Mathematics 2015-09-10 Vladimir L. Popov

We classify and construct irreducible completely splittable representations of affine and finite Hecke-Clifford algebras over an algebraically closed field of characteristic not equal to 2.

Representation Theory · Mathematics 2010-12-03 Jinkui Wan