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We prove that two semigroups with local units are Morita equivalent if and only if they have a joint enlargement. This approach to Morita theory provides a natural framework for understanding McAlister's theory of the local structure of…

Rings and Algebras · Mathematics 2010-03-30 Mark V. Lawson

Let $A$ and $B$ be two Morita equivalent finite dimensional associative algebras over a field $\Bbbk$. It is well known that Hochschild cohomology is invariant under Morita equivalence. Since infinitesimal deformations are connected with…

Rings and Algebras · Mathematics 2021-04-26 María Julia Redondo , Lucrecia Román , Fiorela Rossi Bertone , Melina Verdecchia

In this paper we prove that two idempotent rings are Morita equivalent if every corner of one of them is isomorphic to a corner of a matrix ring of the other one. We establish the converse (which is not true in general) for $\sigma$-unital…

Rings and Algebras · Mathematics 2013-10-01 Mercedes Siles Molina , Jose Felix Solanilla Hernandez

Two rings A and B are said to be derived Morita equivalent if their derived categories of modules are equivalent. By results of Rickard, if A and B are derived Morita equivalent algebras over a field k, then there is a complex of bimodules…

Rings and Algebras · Mathematics 2007-05-23 Amnon Yekutieli

In a recent article of Kenny De Commer, was investigated a Morita equivalence between locally compact quantum groups, in which a measured quantum groupoid, of basis $\mathbb{C}^2$, was constructed as a linking object. Here, we generalize…

Operator Algebras · Mathematics 2012-09-19 Michel Enock

We take advantage of the correspondence between pseudogroups and inverse quantal frames, and of the recent description of Morita equivalence for inverse quantal frames in terms of biprincipal bisheaves, to define Morita equivalence for…

Category Theory · Mathematics 2021-09-07 M. V. Lawson , P. Resende

In this paper we classify all Morita equivalent pairs of (classical) generalized Weyl algebras for generic values of the parameters, thus positively settling a 30 year old question posed by T.Hodges. We also prove a similar result for…

Quantum Algebra · Mathematics 2022-05-04 Akaki Tikaradze

A different proof to a known criterion of derived equivalence implying birationality is given. Derived equivalent smooth projective curves over an algebraically closed field are proved to be isomorphic. A different proof of derived…

Algebraic Geometry · Mathematics 2011-08-10 Yu-Han Liu

Rings form a bicategory [Rings], with classes of bimodules as horizontal arrows, and bimodule maps as vertical arrows. The notion of Morita equivalence for rings can be translated in terms of bicategories in the following way. Two rings are…

Operator Algebras · Mathematics 2015-06-26 R. M. Brouwer

The classical Morita Theorem for rings established the equivalence of three statements, involving categorical equivalences, isomorphisms between corners of finite matrix rings, and bimodule homomorphisms. A fourth equivalent statement…

Rings and Algebras · Mathematics 2022-05-17 Gene Abrams , Efren Ruiz , Mark Tomforde

We develop a technique to show the Morita equivalence of certain subrings of a ring with local units. We then apply this technique to develop conditions that are sufficient to show the Morita equivalence of subalgebras induced by partial…

Rings and Algebras · Mathematics 2025-03-11 Allen Zhang

We study Morita equivalence and Morita duality for rings with local units. We extend the Auslander's results on the theory of Morita equivalence and the Azumaya-Morita duality theorem to rings with local units. As a consequence, we give a…

Representation Theory · Mathematics 2023-05-04 Ziba Fazelpour , Alireza Nasr-Isfahani

This paper is devoted to the study of Morita equivalence for twisted Poisson manifolds. We review some Morita invariants and prove that integrable twisted Poisson manifolds which are gauge equivalent are Morita equivalent. Moreover, we…

Symplectic Geometry · Mathematics 2015-03-17 Yuji Hirota

It is well-known that derived equivalences preserve tensor products and trivial extensions. We disprove both constructions for stable equivalences of Morita type.

Representation Theory · Mathematics 2014-09-08 Yuming Liu , Guodong Zhou , Alexander Zimmermann

We consider algebras in a modular tensor category C. If the trace pairing of an algebra A in C is non-degenerate we associate to A a commutative algebra Z(A), called the full centre, in a doubled version of the category C. We prove that two…

Category Theory · Mathematics 2009-02-24 Liang Kong , Ingo Runkel

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

We associate to any integrable Poisson manifold a stack, i.e. a category fibered in groupoids over a site. The site in question has objects Dirac manifolds and morphisms pairs consisting of a smooth map and a closed 2-form. We show that two…

Symplectic Geometry · Mathematics 2018-04-04 Joel Villatoro

We describe Morita equivalence of unital locally matrix algebras in terms of their Steinitz parametrization. Two countable dimensional unital locally matrix algebras are Morita equivalent if and only if their Steinitz numbers are rationally…

Rings and Algebras · Mathematics 2020-02-18 Oksana Bezushchak , Bogdana Oliynyk

This is a survey paper, based on lectures given at the Workshop on "Structured ring spectra and their applications" which took place January 21-25, 2002, at the University of Glasgow. The term `Morita theory' is usually used for results…

Algebraic Topology · Mathematics 2020-01-13 Stefan Schwede

It was shown by Connes, Douglas, Schwarz[1] that one can compactify M(atrix) theory on noncommutative torus. We prove that compactifications on Morita equivalent tori are physically equivalent. This statement can be considered as a…

High Energy Physics - Theory · Physics 2010-11-19 Albert Schwarz
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