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In this paper we study the representation theory for certain ``half lattice vertex algebras.'' In particular we construct a large class of irreducible modules for these vertex algebras. We also discuss how the representation theory of these…

Quantum Algebra · Mathematics 2007-05-23 Stephen Berman , Chongying Dong , Shaobin Tan

A sufficient condition for the simplicity of induced modules of reductive Lie algebras is given.

Representation Theory · Mathematics 2017-08-24 Chaowen Zhang

We explicitly construct two-sided tilting complexes corresponding to Membrillo-Hern\'{a}ndez's tree-to-star tilting complexes for generalized Brauer tree algebras.

Rings and Algebras · Mathematics 2024-05-16 Shuji Fujino , Yuta Kozakai , Kohei Takamura

Let $A$ be a finite dimensional algebra over an algebraically closed field $k$. We investigate the structure properties of the endomorphism algebras of semi-tilting $A$-modules, and prove that the endomorphism algebras arising from the…

Representation Theory · Mathematics 2015-03-19 Shunhua Zhang

We give a conceptual explanation of universal deformation formulas for unital associative algebras and prove some results on the structure of their moduli spaces. We then generalize universal deformation formulas to other types of algebras…

Algebraic Topology · Mathematics 2013-08-19 Elisabeth Remm , Martin Markl

We give a new proof that the restriction of a cell module of the Hecke algebra of the symmetric group on $n$ letters, to the Hecke algebra of the symmetric group on $n-1$ letters, has a filtration by cell modules.

Representation Theory · Mathematics 2015-04-10 Frederick M. Goodman , Ross Kilgore , Nicholas Teff

Cluster automorphisms have been shown to have links to the mapping class groups of surfaces, maximal green sequences and to exchange graph automorphisms for skew-symmetric cluster algebras. In this paper we aim to generalise these results…

Combinatorics · Mathematics 2016-12-12 John W. Lawson

We demonstrate how exact structures can be placed on the additive category of right operator modules over an operator algebra in order to discuss global dimension for operator algebras. The properties of the Haagerup tensor product play a…

Operator Algebras · Mathematics 2021-05-12 Martin Mathieu , Michael Rosbotham

We construct an action of a Lie algebra on the homology groups of moduli spaces of stable sheaves on K3 surfaces under some technical conditions. This is a generalization of Nakajima's construction of sl_2-action on the homology groups. In…

Algebraic Geometry · Mathematics 2007-05-23 Kota Yoshioka

This paper constructs an explicit homogeneous cellular basis for the cyclotomic Khovanov--Lauda--Rouquier algebras of type $A$.

Representation Theory · Mathematics 2010-02-15 Jun Hu , Andrew Mathas

We apply the full centre construction, defined in arXiv:0908.1250, to algebras in and module categories over categories of representations of Hopf algebras. We obtain a compact formula for the full centre of a module algebra over a Hopf…

Rings and Algebras · Mathematics 2010-03-16 Alexei Davydov

We describe the combinatorics of the cell structure of the tensor category of bimodules over a radical square zero Nakayama algebra. This accounts to an explicit description of left, right, and two-sided cells.

Representation Theory · Mathematics 2018-04-20 Helena Jonsson

We give a diagrammatic calculus for the intertwiners between permutation supermodules over the Sergeev superalgebra. We also give a diagrammatic basis for the space of intertwiners between two permutation supermodules.

Representation Theory · Mathematics 2018-02-13 Gordon C. Brown

A theory of cyclic elements in semisimple Lie algebras is developed. It is applied to an explicit construction of regular elements in Weyl groups.

Algebraic Geometry · Mathematics 2014-01-17 A. G. Elashvili , V. G. Kac , E. B. Vinberg

We use evaluation representations to give a complete classification of the finite-dimensional simple modules of twisted current algebras. This generalizes and unifies recent work on multiloop algebras, current algebras, equivariant map…

Representation Theory · Mathematics 2013-08-21 Michael Lau

In this paper, we introduce Volterra evolution algebras which are evolution algebras whose structural matrices are described by skew symmetric matrices. A main result of the present paper gives a connection between such kind of algebras…

Rings and Algebras · Mathematics 2019-04-24 Izzat Qaralleh , Farrukh Mukhamedov

We construct a diagrammatic categorification of the spherical module over the Hecke algebra. We establish a basis for the morphism spaces of this category, and prove that it is equivalent to an existing algebraic spherical category.

Representation Theory · Mathematics 2026-03-06 Tasman Fell

In this paper we use the Hecke algebra of type $B$ to define a new algebra $\Sch$ which is an analogue of the q-Schur algebra. We construct Weyl modules for $\Sch$ and obtain, as factor modules, a family of irreducible $\Sch$-modules over…

q-alg · Mathematics 2008-02-03 Richard Dipper , Gordon James , Andrew Mathas

We present a class of Poisson structures on trivial extension algebras which generalize some known structures induced by Poisson modules. We show that there exists a one-to-one correspondence between such a class of Poisson structures and…

Rings and Algebras · Mathematics 2023-08-30 D. García-Beltrán , J. C. Ruíz-Pantaleón , Yu. Vorobiev

In this paper, we give a description of the skew-symmetrizable matrices and their mutation classes which are determined by the generalized Cartan matrices of affine type.

Combinatorics · Mathematics 2009-11-24 Ahmet Seven