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These notes include introductory material on the notion of splitting fields for modules over a k-algebra where k is a field.

Representation Theory · Mathematics 2025-01-22 Cihan Bahran

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

This article begins the study of irreducible maps involving finite-dimensional uniserial modules over finite-dimensional associative algebras. We work on the classification of irreducible maps between two uniserials over triangular…

Representation Theory · Mathematics 2007-11-26 Axel Boldt , Ahmad Mojiri

The use of geometric invariants has recently played an important role in the solution of classification problems in non-commutative ring theory. We construct geometric invariants of non-commutative projectivizations, a significant class of…

Rings and Algebras · Mathematics 2009-03-03 A. Nyman

We present a new model of quantum computation rooted in the representation theory of the mass less sector of unitary irreducible representations of the extended Poincare group developed in [1].

Quantum Physics · Physics 2026-03-09 Marco Zaopo

We count points on character varieties associated with punctured surfaces and regular semisimple generic conjugacy classes in reductive groups. We find that the number of points are palindromic polynomials. This suggests a $P=W$ conjecture…

Algebraic Geometry · Mathematics 2026-01-23 Masoud Kamgarpour , GyeongHyeon Nam , Bailey Whitbread , Stefano Giannini

It is shown that the Gelfand--Kirillov dimension for modules over quantum Laurent polynomials is tensor-minimal. The Brookes--Groves invariant associated with a tensor product of modules is determined. It is also shown that there can be…

Rings and Algebras · Mathematics 2011-11-18 Ashish Gupta

We study actions of compact quantum groups on type I factors, which may be interpreted as projective representations of compact quantum groups. We generalize to this setting some of Woronowicz' results concerning Peter-Weyl theory for…

Operator Algebras · Mathematics 2013-08-13 Kenny De Commer

Let Q be a Dynkin quiver, and let P(Q) be the corresponding preprojective algebra. Let I be a set of pairwise different indecomposable irreducible components of varieties of P(Q)-modules such that generically there are no extensions between…

Representation Theory · Mathematics 2019-03-05 Christof Geiß , Jan Schröer

We construct equivariant vector bundles over quantum projective spaces making use of parabolic Verma modules over the quantum general linear group. Using an alternative realization of the quantized coordinate ring of projective space as a…

Quantum Algebra · Mathematics 2019-05-01 Andrey Mudrov

Algebras of functions on quantum weighted projective spaces are introduced, and the structure of quantum weighted projective lines or quantum teardrops are described in detail. In particular the presentation of the coordinate algebra of the…

Quantum Algebra · Mathematics 2015-05-28 Tomasz Brzeziński , Simon A. Fairfax

We consider the problem of classifying irreducible Specht modules for the Iwahori-Hecke algebra of type B with parameters Q,q. We solve this problem completely in the case where q is not a root of unity, and in the case q=-1 we reduce the…

Representation Theory · Mathematics 2012-02-20 Matthew Fayers

We describe an algorithm for splitting permutation representations of finite group over fields of characteristic zero into irreducible components. The algorithm is based on the fact that the components of the invariant inner product in…

Representation Theory · Mathematics 2018-03-06 Vladimir V. Kornyak

We consider the moduli space, in the sense of Kisin, of finite flat models of a 2-dimensional representation with values in a finite field of the absolute Galois group of a totally ramified extension of $mathbb{Q}_p$. We determine the…

Algebraic Geometry · Mathematics 2008-11-12 Eugen Hellmann

Infinite families of multi-indexed orthogonal polynomials are discovered as the solutions of exactly solvable one-dimensional quantum mechanical systems. The simplest examples, the one-indexed orthogonal polynomials, are the infinite…

Mathematical Physics · Physics 2015-05-28 Satoru Odake , Ryu Sasaki

This paper gives an explicit formula for the Ehrhart quasi-polynomial of certain 2-dimensional polyhedra in terms of invariants of surface quotient singularities. Also, a formula for the dimension of the space of quasi-homogeneous…

Algebraic Geometry · Mathematics 2016-09-07 J. I. Cogolludo-Agustin , J. Martin-Morales , J. Ortigas-Galindo

We show that certain semistable sheaves on the projective plane with linear Hilbert polynomial are cokernels of semistable morphisms of decomposable sheaves.We exhibit certain locally closed subvarieties of moduli spaces of semistable…

Algebraic Geometry · Mathematics 2013-11-14 Mario Maican

We investigate the representations of the exotic conformal Galilei algebra. This is done by explicitly constructing all singular vectors within the Verma modules, and then deducing irreducibility of the associated highest weight quotient…

Mathematical Physics · Physics 2015-05-20 Naruhiko Aizawa , Phillip S Isaac

We classify indecomposable non-projective Gorenstein-projective modules over a monomial algebra via the notion of perfect paths. We apply this classification to a quadratic monomial algebra and describe explicitly the stable category of its…

Representation Theory · Mathematics 2015-01-14 Xiao-Wu Chen , Dawei Shen , Guodong Zhou

For modules over a finite-dimensional algebra, there is a canonical one-to-one correspondence between the projective indecomposable modules and the simple modules. In this purely expository note, we take a straight-line path from the…

Rings and Algebras · Mathematics 2014-10-15 Tom Leinster