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We give a full classification, in terms of periodic skew diagrams, of irreducible semisimple modules in category O for the degenerate double affine Hecke algebra of type A which can be realized as submodules of Verma modules.

Representation Theory · Mathematics 2016-08-09 Martina Balagovic

Several recent results concerning Hom-Leibniz algebra are reviewed, the notion of symmetric Hom-Leibniz superalgebra is introduced and some properties are obtained. Classification of 2-dimensional Hom-Leibniz algebras is provided. Centroids…

Rings and Algebras · Mathematics 2021-10-27 Anja Arfa , Nejib Saadaoui , Sergei Silvestrov

Inductive algebras for the irreducible unitary representations of the universal cover of the group of unimodular two by two matrices are classified. The classification of homogeneous shift operators is obtained as a direct consequence. This…

Functional Analysis · Mathematics 2010-11-11 Amritanshu Prasad , M. K. Vemuri

Suppose a finite group acts on a scheme X and a finite-dimensional Lie algebra g. The corresponding equivariant map algebra is the Lie algebra M of equivariant regular maps from X to g. We classify the irreducible finite-dimensional…

Representation Theory · Mathematics 2012-04-11 Erhard Neher , Alistair Savage , Prasad Senesi

We classify Nichols algebras of irreducible Yetter-Drinfeld modules over nonabelian groups satisfying an inequality for the dimension of the homogeneous subspace of degree two. All such Nichols algebras are finite-dimensional, and all known…

Quantum Algebra · Mathematics 2011-05-31 M. Graña , I. Heckenberger , L. Vendramin

The work is devoted to the variety of $2$-dimensional algebras over an algebraically closed field. Firstly, we classify such algebras modulo isomorphism. Then we describe the degenerations and the closures of principal algebra series in the…

Rings and Algebras · Mathematics 2020-04-03 Ivan Kaygorodov , Yury Volkov

We call a finite-dimensional K-algebra A geometrically irreducible if for all d, all connected components of the affine scheme of d-dimensional A-modules are irreducible. We show that the geometrically irreducible algebras without loops…

Representation Theory · Mathematics 2017-09-19 Grzegorz Bobiński , Jan Schröer

The set of linear, differential operators preserving the vector space of couples of polynomials of degrees n and n-2 in one real variable leads to an abstract associative graded algebra A(2). The irreducible, finite dimensional…

solv-int · Physics 2009-10-30 Y. Brihaye , S. Giller , P. Kosinski , J. Nuyts

We give the algebraic and geometric classification of complex four-dimensional Jordan superalgebras. In particular, we describe all irreducible components in the corresponding varieties.

Rings and Algebras · Mathematics 2025-10-09 Kobiljon Abdurasulov , Roman Lubkov , Azamat Saydaliyev

Let V be a simple vertex operator algebra and G a finite automorphism group. Then there is a natural right G-action on the set of all inequivalent irreducible V-modules. Let S be a finite set of inequivalent irreducible V-modules which is…

Quantum Algebra · Mathematics 2007-05-23 C. Dong , G. Yamskulna

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

In this paper, we first classify all irreducible modules of the vertex algebra $V_L^+$ when $L$ is a negative definite even lattice of arbitrary rank. In particular, we show that any irreducible $V_L^+$-module is isomorphic to a submodule…

Quantum Algebra · Mathematics 2008-07-08 Gaywalee Yamskulna

A complete classifications, up to isomorphism, of two-dimensional associative and diassociative algebras over any basic field are given.

Rings and Algebras · Mathematics 2023-07-20 I. S. Rakhimov

The irreducible modules of the 2-cycle permutation orbifold models of lattice vertex operator algebras of rank 1 are classified, the quantum dimensions of irreducible modules and the fusion rules are determined.

Quantum Algebra · Mathematics 2015-01-05 Chongying Dong , Feng Xu , Nina Yu

Foundations of the theory of vertex algebras are extended to the non-Archimedean setting.

Quantum Algebra · Mathematics 2023-04-20 Victor G. Kac

Twisted loop algebras of the second kind are infinite-dimensional Lie algebras that are constructed from a semisimple Lie algebra and an automorphism on it of order at most $2$. They are examples of equivariant map algebras. The…

Representation Theory · Mathematics 2025-06-04 Hideya Watanabe

Geometric vertex algebras are a simplified version of Huang's geometric vertex operator algebras. We give a self-contained account of the equivalence of geometric vertex algebras with Z-graded vertex algebras.

Quantum Algebra · Mathematics 2026-01-06 Daniel Bruegmann

We extend a classification of irreducible, almost-commutative geometries whose spectral action is dynamically non-degenerate, to internal algebras that have six simple summands. We find essentially four particle models: An extension of the…

High Energy Physics - Theory · Physics 2014-11-18 Jan-Hendrik Jureit , Christoph A. Stephan

We classify the $4$-dimensional nilpotent bicommutative algebras over $\mathbb C$ from both algebraic and geometric approaches.

Rings and Algebras · Mathematics 2020-04-03 Ivan Kaygorodov , María Pilar Paez Guillán , Vasily Voronin

In this paper we study the complete reducibility of representations of infinite-dimensional Lie algebras from the perspective of the representation theory of vertex algebras.

Mathematical Physics · Physics 2011-09-06 M. Gorelik , V. Kac