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We introduce the rigid tensor category of tubular partitions, and use it to provide a combinatorial model for the representation category of the quantum automorphism group of a homogeneous rooted tree.

Operator Algebras · Mathematics 2025-09-29 Nathan Brownlowe , David Robertson

We give a presentation of Feynman categories from a representation--theoretical viewpoint. Feynman categories are a special type of monoidal categories and their representations are monoidal functors. They can be viewed as a far reaching…

Representation Theory · Mathematics 2020-10-27 Ralph M. Kaufmann

A braid representation is a monoidal functor from the braid category $\mathsf{B}$, for example given by a solution to the constant Yang-Baxter equation. Given a monoidal category $\mathsf{C}$ with $ob(\mathsf{C})=\mathbb{N}$, a rank-$N$…

Quantum Algebra · Mathematics 2023-03-02 Paul Martin , Eric C. Rowell

Here a loop braid representation is a monoidal functor $\mathsf{F}$ from the loop braid category $\mathsf{L}$ to a suitable target category, and is $N$-charge-conserving if that target is the category $\mathsf{Match}^N$ of charge-conserving…

Quantum Algebra · Mathematics 2023-02-28 Paul Martin , Eric C. Rowell , Fiona Torzewska

It is shown that the multiplicative monoids of Temperley-Lieb algebras generated out of the basis are isomorphic to monoids of endomorphisms in categories where an endofunctor is adjoint to itself. Such a self-adjunction is found in a…

Geometric Topology · Mathematics 2008-07-10 K. Dosen , Z. Petric

In this paper we study multiserial and special multiserial algebras. These algebras are a natural generalization of biserial and special biserial algebras to algebras of wild representation type. We define a module to be multiserial if its…

Representation Theory · Mathematics 2016-08-08 Edward L. Green , Sibylle Schroll

We introduce new techniques for working with presentations for a large class of (strict) tensor categories. We then apply the general theory to obtain presentations for partition, Brauer and Temperley-Lieb categories, as well as several…

Category Theory · Mathematics 2023-12-18 James East

Using the affine web category introduced in a prequel as a building block, we formulate a diagrammatic $\Bbbk$-linear monoidal category, the affine Schur category, for any commutative ring $\Bbbk$. We then formulate diagrammatic categories,…

Representation Theory · Mathematics 2024-12-25 Linliang Song , Weiqiang Wang

Given a rigidly-compactly generated tensor-triangulated category whose Balmer spectrum is finite dimensional and Noetherian, we construct a torsion model for it, which is equivalent to the original tensor-triangulated category. The torsion…

Algebraic Topology · Mathematics 2025-01-10 Scott Balchin , J. P. C. Greenlees , Luca Pol , Jordan Williamson

In this work, we introduce a new class of algebras called skew-Brauer graph algebras, which generalize the well-known Brauer graph algebras. We establish that skew-Brauer graph algebras are symmetric and can be defined using a Brauer graph…

Representation Theory · Mathematics 2025-11-24 Ana García Elsener , Victoria Guazzelli , Yadira Valdivieso

We show that a compact rigid balanced braided monoidal category with enough compact projective objects gives rise to a system of mapping class group representations compatible with the gluing along marked intervals. A motivation to consider…

Quantum Algebra · Mathematics 2026-02-24 Deniz Yeral

We define the affinization of an arbitrary monoidal category $\mathcal{C}$, corresponding to the category of $\mathcal{C}$-diagrams on the cylinder. We also give an alternative characterization in terms of adjoining dot generators to…

Category Theory · Mathematics 2021-11-12 Youssef Mousaaid , Alistair Savage

The diagram algebra introduced by Brauer that describes the centralizer algebra on tensor products of the natural representation of an orthogonal group has a presentation by generators and relations that only depends on the graph of type An…

Representation Theory · Mathematics 2007-05-23 Arjeh M Cohen , Bart Frenk , David Wales

We investigate tensor products of matrix factorisations. This is most naturally done by formulating matrix factorisations in terms of bimodules instead of modules. If the underlying ring is C[x_1,...,x_N] we show that bimodule matrix…

Mathematical Physics · Physics 2014-11-20 Nils Carqueville , Ingo Runkel

Circuit algebras, used in the study of finite-type knot invariants, are a symmetric analogue of Jones's planar algebras. They are very closely related to circuit operads, which are a variation of modular operads admitting an extra monoidal…

Category Theory · Mathematics 2025-01-22 Sophie Raynor

In this paper we introduce a generalization of a Brauer graph algebra which we call a Brauer configuration algebra. As with Brauer graphs and Brauer graph algebras, to each Brauer configuration, there is an associated Brauer configuration…

Representation Theory · Mathematics 2017-05-19 Edward L. Green , Sibylle Schroll

The Brauer-Chen algebra is a generalization of the algebra of Brauer diagrams to arbitrary complex reflection groups, that admits a natural monodromic deformation. We determine the generic representation theory of the first non trivial…

Representation Theory · Mathematics 2019-09-04 Ivan Marin

We introduce and study a multiparameter colored partition category $\mathcal{CPar}(\textbf{x})$ by extending the construction of the partition category, over an algebraically closed field $\Bbbk$ of characteristic zero and for a…

Representation Theory · Mathematics 2022-05-31 Volodymyr Mazorchuk , Shraddha Srivastava

The differential Brauer monoid of a differential commutative ring R s defined. Its elements are the isomorphism classes of differential Azumaya R algebras with operation from tensor product subject to the relation that two such algebras are…

Rings and Algebras · Mathematics 2023-03-16 Andy R. Magid

We detail a construction of a symmetric monoidal structure, called the reduced tensor product on the 2-category of braided tensor categories $\mathbf{BTC}(\mathcal{A})$ containing a fixed symmetric fusion subcategory $\mathcal{A}$. The…

Quantum Algebra · Mathematics 2024-04-15 Thomas A. Wasserman