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For each braided category $\mathcal{C}$ we show that, under mild hypotheses, there is an associated category of "half braided algebras" and their bimodules internal to $\mathcal{C}$ which is not only monoidal but even braided and balanced.…

Quantum Algebra · Mathematics 2026-03-06 Francesco Costantino , Matthieu Faitg

In the previous author's paper the Macdonald norm conjecture (including the famous constant term conjecture) was proved. This paper contains the proof of the remaining two (the duality and evaluation conjectures). The evaluation theorem is…

q-alg · Mathematics 2009-10-28 Ivan Cherednik

The analogy between Yetter's deformation theory form (lax) monoidal functors and Gerstenahaber's deformation theory for associative algebras is solidified by shown that under reasonable conditions the category of functors with an action of…

Category Theory · Mathematics 2007-05-23 David N. Yetter

We briefly report on our result that the braided tensor product algebra of two module algebras $A_1,A_2$ of a quasitriangular Hopf algebra $H$ is equal to the ordinary tensor product algebra of $H_1$ with a subalgebra isomorphic to $A_2$…

Quantum Algebra · Mathematics 2009-10-31 Gaetano Fiore , Harold Steinacker , Julius Wess

We develop the theory of Hopf bimodules for a finite rigid tensor category C. Then we use this theory to define a distinguished invertible object D of C and an isomorphism of tensor functors ?^{**} and D tensor ^{**}? tensor D^{-1}. This…

Quantum Algebra · Mathematics 2009-05-19 Pavel Etingof , Dmitri Nikshych , Viktor Ostrik

Categorical aspects of the theory of modules over trusses are studied. Tensor product of modules over trusses is defined and its existence established. In particular, it is shown that bimodules over trusses form a monoidal category. Truss…

Rings and Algebras · Mathematics 2022-03-31 Tomasz Brzeziński , Bernard Rybołowicz , Paolo Saracco

We establish a version of Howe duality that involves a tensor product of Verma modules. Surprisingly, this duality leaves the realm of lowest and highest weight modules. We quantize this duality, and as an application, we prove that the…

Representation Theory · Mathematics 2026-03-30 Abel Lacabanne , Daniel Tubbenhauer , Pedro Vaz

In this paper, the Drinfeld center of a monoidal category is generalized to a class of mixed Drinfeld centers. This gives a unified picture for the Drinfeld center and a natural Heisenberg analogue. Further, there is an action of the former…

Quantum Algebra · Mathematics 2020-08-18 Robert Laugwitz

The object of this paper is to prove that the standard categories in which homotopy theory is done, such as topological spaces, simplicial sets, chain complexes of abelian groups, and any of the various good models for spectra, are all…

Algebraic Topology · Mathematics 2009-10-21 Mark Hovey

We introduce a candidate for the inner hom for $Dbl^{st}_{lx}$, the category of strict double categories and lax double functors, and characterize a lax double functor into it obtaining a lax double quasi-functor. The latter consists of a…

Category Theory · Mathematics 2023-04-03 Bojana Femić

This is the first in a series of papers that deals with duality statements such as Mukai-duality (T-duality, from algebraic geometry) and the Baum-Connes conjecture (from operator $K$-theory). These dualities are expressed in terms of…

Quantum Algebra · Mathematics 2009-07-27 Jonathan Block

We develop a tensor categorical duality in the sprit of the Tannaka-Krein duality for the C*-algebras admitting the Yetter-Drinfeld module structure over a compact quantum group. Under this duality, given a reduced compact quantum group G,…

Operator Algebras · Mathematics 2026-03-16 Lucas Hataishi , Makoto Yamashita

Given a Hopf algebra $H$ and a projection $H\to A$ to a Hopf subalgebra, we construct a Hopf algebra $r(H)$, called the partial dualization of $H$, with a projection to the Hopf algebra dual to $A$. This construction provides powerful…

Quantum Algebra · Mathematics 2015-04-24 Alexander Barvels , Simon Lentner , Christoph Schweigert

Let A be an algebra with a countable basis and let B be, say, a Frechet algebra that contains A as a dense subalgebra. This embedding induces a functor from the derived category of B-modules to the derived category of A-modules. In many…

Functional Analysis · Mathematics 2007-05-23 Ralf Meyer

Using Dold--Puppe category approach to the duality in topology, we prove general duality theorem for the category of motives. As one of the applications of this general result we obtain, in particular, a generalization of…

Algebraic Geometry · Mathematics 2008-10-14 Ivan Panin , Serge Yagunov

Using the tensor category theory developed by Lepowsky, Zhang and the second author, we construct a braided tensor category structure with a twist on a semisimple category of modules for an affine Lie algebra at an admissible level. We…

Quantum Algebra · Mathematics 2018-08-29 Thomas Creutzig , Yi-Zhi Huang , Jinwei Yang

A known fundamental Theorem for braided pointed Hopf algebras states that for each coideal subalgebra, that fulfils a few properties, there is an associated quotient coalgebra right module such that the braided Hopf algebra can be…

Quantum Algebra · Mathematics 2023-06-27 Istvan Heckenberger , Katharina Schäfer

The bicategorical point of view provides a natural setting for many concepts in the representation theory of monoidal categories. We show that centers of twisted bimodule categories correspond to categories of 2-dimensional natural…

Category Theory · Mathematics 2023-06-09 Bojana Femić , Sebastian Halbig

For finite dimensional algebras over algebraically closed fields, we study the sets of pairwise Hom-orthogonal modules and obtain new results on some open conjectures on the behaviour of bricks and several related problems, which we…

Representation Theory · Mathematics 2025-02-18 Kaveh Mousavand , Charles Paquette

We give an interpretation of Yetter's Invariant of manifolds $M$ in terms of the homotopy type of the function space $TOP(M,B(G))$, where $G$ is a crossed module and $B(G)$ is its classifying space. From this formulation, there follows that…

Quantum Algebra · Mathematics 2017-05-23 João Faria Martins , Timothy Porter