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We classify braided generalized near-group fusion categories whose global dimension is not an integer; there are exactly two up to Grothendieck equivalence and taking products with braided pointed fusion categories.

Quantum Algebra · Mathematics 2022-12-29 Andrew Schopieray

We show that braidings on a fusion category $\mathcal{C}$ correspond to certain fusion subcategories of the center of $\mathcal{C}$ transversal to the canonical Lagrangian algebra. This allows to classify braidings on non-degenerate and…

Quantum Algebra · Mathematics 2018-07-27 Dmitri Nikshych

Let $k$ be a field, and let $\mathcal{C}$ be a Cauchy complete $k$-linear braided category with finite dimensional morphism spaces and ${{\rm End}(\bf 1)}=k$. We call an indecomposable object $X$ of $\mathcal C$ non-negligible if there…

Quantum Algebra · Mathematics 2026-02-18 Pavel Etingof , David Penneys

We show that the word problem for braided monoidal categories is at least as hard as the unknotting problem. As a corollary, so is the word problem for Gray categories. We conjecture that the word problem for Gray categories is decidable.

Category Theory · Mathematics 2022-11-04 Antonin Delpeuch , Jamie Vicary

We give a rigorous development of the construction of new braided fusion categories from a given category known as zesting. This method has been used in the past to provide categorifications of new fusion rule algebras, modular data, and…

Quantum Algebra · Mathematics 2025-04-23 Colleen Delaney , César Galindo , Julia Plavnik , Eric C. Rowell , Qing Zhang

We develop the Witt group for certain braided monoidal categories with duality. In case of a braided fusion category over an algebraically closed field of characteristic zero, we explicitly describe this structure. We then use this…

K-Theory and Homology · Mathematics 2014-12-11 Isar Goyvaerts , Ehud Meir

We introduce a finiteness property for braided fusion categories, describe a conjecture that would characterize categories possessing this, and verify the conjecture in a number of important cases. In particular we say a category has F if…

Quantum Algebra · Mathematics 2011-09-12 Deepak Naidu , Eric C. Rowell

We introduce a weakening of the notion of fusion 2-category given in arXiv:1812.11933. Then, we establish a number of properties of (multi)fusion 2-categories. Finally, we describe the fusion rule of the fusion 2-categories associated to…

Quantum Algebra · Mathematics 2022-11-09 Thibault D. Décoppet

A braided fusion category is said to have Property $\textbf{F}$ if the associated braid group representations factor over a finite group. We verify integral metaplectic modular categories have property $\textbf{F}$ by showing these…

Fusion categories are fundamental objects in quantum algebra, but their definition is narrow in some respects. By definition a fusion category must be k-linear for some field k, and every simple object V is strongly simple, meaning that (V)…

Quantum Algebra · Mathematics 2019-09-16 Greg Kuperberg

Unitary Ribbon Fusion Categories (URFC) formalize anyonic theories. It has been widely assumed that the same category formalizes a topological quantum computing model. However, in previous work, we addressed and resolved this confusion and…

Quantum Physics · Physics 2025-06-02 Fatimah Rita Ahmadi

We describe how the study of superfusion categories (roughly speaking, fusion categories enriched over the category of super vector spaces) reduces to that of fusion categories over sVect, in the sense of Drinfeld, Gelaki, Nikshych, and…

Quantum Algebra · Mathematics 2016-06-14 Robert Usher

We provide a general formula for Mueger's centralizer of any fusion subcategory of a braided fusion category containing a tannakian subcategory. This entails a description for Mueger's centralizer of all fusion subcategories of a group…

Quantum Algebra · Mathematics 2014-05-06 S. Burciu

We give two proofs of a level-rank duality for braided fusion categories obtained from quantum groups of type $C$ at roots of unity. The first proof uses conformal embeddings, while the second uses a classification of braided fusion…

Quantum Algebra · Mathematics 2020-02-19 Victor Ostrik , Eric C. Rowell , Michael Sun

Braided-enriched monoidal categories were introduced in work of Morrison-Penneys, where they were characterized using braided central functors. Recent work of Kong-Yuan-Zhang-Zheng and Dell extended this characterization to an equivalence…

Category Theory · Mathematics 2022-09-02 Zachary Dell , Peter Huston , David Penneys

This is a study of weakly integral braided fusion categories with elementary fusion rules to determine which possess nondegenerately braided extensions of theoretically minimal dimension, or equivalently in this case, which satisfy the…

Quantum Algebra · Mathematics 2021-09-10 Andrew Schopieray

In this Part II, we apply the general theory developed in Part I to a detailed analysis of the Constraint Satisfaction Problem (CSP). We show how specific types of resolution rules can be defined. In particular, we introduce the general…

Artificial Intelligence · Computer Science 2013-04-12 Denis Berthier

Presentations for unbraided, braided and symmetric pseudomonoids are defined. Biequivalences characterising the semistrict bicategories generated by these presentations are proven. It is shown that these biequivalences categorify results in…

Category Theory · Mathematics 2018-12-04 Dominic Verdon

Using a variety of methods developed in the literature (in particular, the theory of weak Hopf algebras), we prove a number of general results about fusion categories in characteristic zero. We show that the global dimension of a fusion…

Quantum Algebra · Mathematics 2017-05-01 Pavel Etingof , Dmitri Nikshych , Viktor Ostrik

Our recent approach to the Finkelberg-Kazhdan-Lusztig equivalence theorem centers on the construction of a fiber functor associated with the categories in the equivalence theorem, which in turn explains the underlying algebraic and analytic…

Operator Algebras · Mathematics 2026-04-07 Claudia Pinzari