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Related papers: Morita theory for finitary 2-categories

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We develop the Morita theory of fusion 2-categories. In order to do so, we begin by proving that the relative tensor product of modules over a separable algebra in a fusion 2-category exists. We use this result to construct the Morita…

Category Theory · Mathematics 2023-06-06 Thibault D. Décoppet

We extend the 2-representation theory of finitary 2-categories to certain 2-categories with infinitely many objects, denoted locally finitary 2-categories, and extend the classical classification results of simple transitive…

Category Theory · Mathematics 2022-01-19 James Macpherson

In this note we discuss Morita equivalence classes of arbitrary finitely presented algebras

Rings and Algebras · Mathematics 2018-06-05 Adel Alahmadi , Hamed Alsulami , Efim Zelmanov

We define locally wide finitary 2-categories by relaxing the definition of finitary 2-categories to allow infinitely many objects and isomorphism classes of 1-morphisms and infinite dimensional hom-spaces of 2-morphisms. After defining…

Category Theory · Mathematics 2021-06-24 James Macpherson

This is an extended version of my earlier articel "Projective and injective objects in symmetric categorical groups. arXiv:1007.0121v1." Several new facts added, including the material on the derived 2-functors and the proof of the…

Category Theory · Mathematics 2010-12-24 Teimuraz Pirashvili

Morita theory for quantales is developed. The main result of the paper is a characterization of those quantaloids (categories enriched in the symmetric monoidal closed category of sup-lattices) that are equivalent to modular categories over…

Category Theory · Mathematics 2025-02-18 Bachuki Mesablishvili

In this article, we develop a generalization of finitary birepresentation theory applicable to Soergel bimodules for infinite Coxeter groups. We establish a reduction process for the classification of simple birepresentations of almost…

Representation Theory · Mathematics 2026-04-23 Marco Mackaay , Vanessa Miemietz , Pedro Vaz

We construct a category equivalent to the category $\mathbf{Mon}$ of monoids and monoid homomorphisms, based on categories with strict factorization systems. This equivalence is then extended to the category $\mathbf{Mon_s}$ of unital…

Category Theory · Mathematics 2025-10-31 Xavier Mary

In this paper, we discuss the generalization of finitary $2$-representation theory of finitary $2$-categories to finitary birepresentation theory of finitary bicategories. In previous papers on the subject, the classification of simple…

Representation Theory · Mathematics 2021-09-27 Marco Mackaay , Volodymyr Mazorchuk , Vanessa Miemietz , Daniel Tubbenhauer , Xiaoting Zhang

In this article we analyze the structure of $2$-categories of symmetric projective bimodules over a finite dimensional algebra with respect to the action of a finite abelian group. We determine under which condition the resulting…

Representation Theory · Mathematics 2019-04-12 Volodymyr Mazorchuk , Vanessa Miemietz , Xiaoting Zhang

This note uses a variation of graded Morita theory for finite dimensional superalgebras to determine explicitly the graded basic superalgebras for all real and complex Clifford superalgebras. As an application, the Grothendieck groups of…

Rings and Algebras · Mathematics 2012-04-20 Deke Zhao

We study finitary 2-categories associated to dual projection functors for finite dimensional associative algebras. In the case of path algebras of admissible tree quivers (which includes all Dynkin quivers of type A) we show that the monoid…

Representation Theory · Mathematics 2017-05-10 Anna-Louise Grensing , Volodymyr Mazorchuk

Tilting theory has been a very important tool in the classification of finite dimensional algebras of finite and tame representation type, as well as, in many other branches of mathematics. Happel [Ha] proved that generalized tilting…

Representation Theory · Mathematics 2011-10-24 R. Martínez-Villa , M. Ortiz-Morales

We determine for which Coxeter types the associated small quotient of the $2$-category of Soergel bimodules is finitary and, for such a small quotient, classify the simple transitive $2$-representations (sometimes under the additional…

Representation Theory · Mathematics 2018-10-09 Hankyung Ko , Volodymyr Mazorchuk

The Morita context provided by an exact module category over a finite tensor category gives a two-object bicategory with duals. Right and left duals of objects in the module category are given by internal Homs and coHoms, respectively. We…

Quantum Algebra · Mathematics 2023-10-19 Jürgen Fuchs , César Galindo , David Jaklitsch , Christoph Schweigert

A finite pre-tensor category is a finite abelian category equipped with a right exact tensor product for which every projective object has duals. Finite tensor categories, for which every object has duals, are notable examples. More…

Quantum Algebra · Mathematics 2026-04-14 Thibault D. Décoppet , Mateusz Stroiński

We describe the class of semi-stable model categories, which generalize the equivalence of finite products and coproducts in abelian and stable model categories, and use this to establish Morita equivalences among categories of functors. We…

Category Theory · Mathematics 2016-01-06 Randall D. Helmstutler

This paper develops a theory of pretriangulated 2-representations of dg 2-categories. We characterize cyclic pretriangulated 2-representations, under certain compactness assumptions, in terms of dg modules over dg algebra 1-morphisms…

Representation Theory · Mathematics 2025-04-24 Robert Laugwitz , Vanessa Miemietz

The monoidal version of classical Morita theory is a theory of bialgebroids. To make this explicit we construct a bicategory the objects of which are the bialgebroids and in which equivalence of objects means that the corresponding module…

Quantum Algebra · Mathematics 2007-05-23 K. Szlachanyi

We define a notion of equivalence between algebraic dependent type theories which we call Morita equivalence. This notion has a simple syntactic description and an equivalent description in terms of models of the theories. The category of…

Category Theory · Mathematics 2020-09-29 Valery Isaev
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