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We introduce a generalization of degenerate affine Hecke algebra, called wreath Hecke algebra, associated to an arbitrary finite group G. The simple modules of the wreath Hecke algebra and of its associated cyclotomic algebras are…

Representation Theory · Mathematics 2008-11-01 Jinkui Wan , Weiqiang Wang

Constellations are partial algebras that are one-sided generalisations of categories. It has previously been shown that the category of inductive constellations is isomorphic to the category of left restriction semigroups. Here we consider…

Category Theory · Mathematics 2015-10-21 Victoria Gould , Tim Stokes

The notion of singular reduction modules, i.e., of singular modules of nonclassical (conditional) symmetry, of differential equations is introduced. It is shown that the derivation of nonclassical symmetries for differential equations can…

Mathematical Physics · Physics 2017-12-05 Vaycheslav M. Boyko , Michael Kunzinger , Roman O. Popovych

We introduce the category HG, whose objects are topological groupoids endowed with compatible measure theoretic data: a Haar system and a measure on the unit space. We then define and study the notion of weak-pullback in the category of…

Functional Analysis · Mathematics 2011-01-18 Aviv Censor , Daniele Grandini

Recently, several authors have adopted new alternative approaches in the study of some classical notions of modules. Among them, we find the notion of subprojectivity which was introduced to measure in a way the degree of projectivity of…

Rings and Algebras · Mathematics 2021-06-22 Driss Bennis , J. R. Garcia Rozas , Hanane Ouberka , Luis Oyonarte

It is now very known how the subprojectivity of modules provides a fruitful new unified framework of the classical projectivity and flatness. In this paper, we extend this fact to the category of complexes by generalizing and unifying…

Category Theory · Mathematics 2022-03-03 Driss Bennis , Juan Ramón García Rozas , Hanane Ouberka , Luis Oyonarte

We classify semisimple module categories over the tensor category of representations of quantum SL(2) extending previous results to the roots of unity and positive characteristic cases.

Quantum Algebra · Mathematics 2007-05-23 Victor Ostrik

We describe equivalence classes of exact indecomposable module categories over a finite graded tensor category. When applied to a pointed fusion category, our results coincide with the ones obtained in [S. Natale, On the equivalence of…

Quantum Algebra · Mathematics 2020-04-10 Adriana Mejía Castaño , Martín Mombelli

Let $P$ be a polarization on a symplectic manifold for which there exists a metalinear frame bundle. We show that for any other compatible polarization $P'$ there exists a unique metalinear frame bundle such that the BKS-pairing is well…

Mathematical Physics · Physics 2016-06-22 Gijs M. Tuynman

In this paper we describe how to give a particular global category of rings and modules the structure of a relaxed multi category, and we describe an algebra in this relaxed multi category such that vertex algebras appear as such algebras.

Category Theory · Mathematics 2007-05-23 Craig T. Snydal

In this paper, a classification of modules of the intermediate series over the twisted N=2 superconformal algebra is obtained.

Rings and Algebras · Mathematics 2008-12-31 Junbo Li , Yucai Su , Linsheng Zhu

This paper introduces the notion of weakly globular double categories, a particular class of strict double categories, as a way to model weak 2-categories; it explores its use in defining a double category of fractions, and shows that the…

Category Theory · Mathematics 2013-03-28 Simona Paoli , Dorette Pronk

Categories of W*-bimodules are shown in an explicit and algebraic way to constitute an involutive W*-bicategory.

Operator Algebras · Mathematics 2017-06-14 Yusuke Sawada , Shigeru Yamagami

Congruence families, i.e., $\ell$-adic convergence for well-defined arithmetic subsequences, is a commonplace phenomenon for the coefficients of modular forms. Such families superficially resemble one another, but they often vary…

Number Theory · Mathematics 2024-03-19 Nicolas Allen Smoot

We classify generic coadjoint orbits for symplectomorphism groups of compact symplectic surfaces with or without boundary. We also classify simple Morse functions on such surfaces up to a symplectomorphism.

Symplectic Geometry · Mathematics 2021-11-01 Ilia Kirillov

In this paper we provide a unifying description of different types of semantics of modal logic found in the literature via the framework of topological categories. In the style of categorical logic, we establish an exact correspondence…

Category Theory · Mathematics 2023-08-01 Lingyuan Ye

We give a new construction of the algebraic $K$-theory of small permutative categories that preserves multiplicative structure, and therefore allows us to give a unified treatment of rings, modules, and algebras in both the input and…

K-Theory and Homology · Mathematics 2009-09-29 A. D. Elmendorf , M. A. Mandell

For a commutative noetherian ring A, we compare the support of a complex of A-modules with the support of its cohomology. This leads to a classification of all full subcategories of A-modules which are thick (that is, closed under taking…

Commutative Algebra · Mathematics 2007-05-23 Henning Krause

This is a survey on spherical Hopf algebras. We give criteria to decide when a Hopf algebra is spherical and collect examples. We discuss tilting modules as a mean to obtain a fusion subcategory of the non-degenerate quotient of the…

The class of all quasigroups is covered by six classes: the class of all asymmetric quasigroups and five varieties of quasigroups (commutative, left symmetric, right symmetric, semi-symmetric and totally symmetric). Each of these classes is…

Group Theory · Mathematics 2016-01-29 Halyna Krainichuk