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We produce a cofibrantly generated simplicial symmetric monoidal model structure for the category of (small unital) C*-categories, whose weak equivalences are the unitary equivalences. The closed monoidal structure consists of the maximal…

Category Theory · Mathematics 2012-11-13 Ivo Dell'Ambrogio

Let $H$ be a dual quasi-Hopf algebra. In this paper we will firstly introduce all possible categories of Yetter-Drinfeld modules over $H$, and give explicitly the monoidal and braided structure of them. Then we prove that the category…

Rings and Algebras · Mathematics 2020-10-22 Daowei Lu , Xiaohui Zhang , Dingguo Wang

We compare two models for $\infty$-operads: the complete Segal operads of Barwick and the complete dendroidal Segal spaces of Cisinski and Moerdijk. Combining this with comparison results already in the literature, this implies that all…

Algebraic Topology · Mathematics 2020-11-03 Hongyi Chu , Rune Haugseng , Gijs Heuts

In this paper we introduce novel views of monoids and groups. More specifically, for a given set $S$, let $S^{S\times S}$ be the set of binary operations on $S$. We equip $S^{S\times S}$ with canonical binary operations induced by the…

Group Theory · Mathematics 2017-06-28 Masayoshi Kaneda

The category of modules over the endomorphism algebra of a rigid object in a Hom-finite triangulated category C has been given two different descriptions: On the one hand, as shown by Osamu Iyama and Yuji Yoshino, it is equivalent to an…

Representation Theory · Mathematics 2014-12-24 Yann Palu

Here we prove a Poincar\'e-Verdier duality theorem for the o-minimal sheaf cohomology with definably compact supports of definably normal, definably locally compact spaces in an arbitrary o-minimal structure.

Algebraic Geometry · Mathematics 2010-10-07 Mario J. Edmundo , Luca Prelli

There are two dual equivalences between the $\infty$-category of $\mathcal{O}$-monoidal $\infty$-categories with right adjoint lax $\mathcal{O}$-monoidal functors and that with left adjoint oplax $\mathcal{O}$-monoidal functors, where…

Category Theory · Mathematics 2025-01-28 Takeshi Torii

A quasi-Hopf algebra $H$ can be seen as a commutative algebra $A$ in the centre $\mathcal Z(H-Mod)$ of $H-Mod$. We show that the category of $A$-modules in $\mathcal Z(H-Mod)$ is equivalent (as a monoidal category) to $H-Mod$. This can be…

Quantum Algebra · Mathematics 2014-02-14 Štefan Sakáloš

We study differential graded operads and $p$-adic stable homotopy theory. We first construct a new class of differential graded operads, which we call the stable operads. These operads are, in a particular sense, stabilizations of…

Algebraic Topology · Mathematics 2025-06-19 Montek Singh Gill

We show that braided, sylleptic and symmetric monoidal bicategories are precisely the $\mathsf{E}_k$-monoids in the cartesian monoidal $(\infty,1)$-category of bicategories for respective integers $k$. To manage the underlying computations,…

Category Theory · Mathematics 2026-02-17 Raffael Stenzel

We define the category of tidy symmetric multicategories. We construct for each tidy symmetric multicategory Q a cartesian monad (E_Q,T_Q) and extend this assignation to a functor. We exhibit a relationship between the slice construction on…

Category Theory · Mathematics 2007-05-23 Eugenia Cheng

A moment category is endowed with a distinguished set of split idempotents, called moments, which can be transported along morphisms. Equivalently, a moment category is a category with an active/inert factorisation system fulfilling two…

Category Theory · Mathematics 2023-03-14 Clemens Berger

We extend the theory of d-categories, by providing an explicit description of the right mapping spaces of the d-homotopy category of an $\infty$-category. Using this description, we deduce an invariant $\infty$-categorical characterization…

Algebraic Topology · Mathematics 2019-02-13 Tomer M. Schlank , Lior Yanovski

A monoidal model category is a model category with a compatible closed monoidal structure. Such things abound in nature; simplicial sets and chain complexes of abelian groups are examples. Given a monoidal model category, one can consider…

Algebraic Topology · Mathematics 2007-05-23 Mark Hovey

We develop an $\infty$-categorical version of the classical theory of polynomial and analytic functors, initial algebras, and free monads. Using this machinery, we provide a new model for $\infty$-operads, namely $\infty$-operads as…

Algebraic Topology · Mathematics 2020-10-30 David Gepner , Rune Haugseng , Joachim Kock

We prove that the category of Nachbin's compact ordered spaces and order-preserving continuous maps between them is dually equivalent to a variety of algebras, with operations of at most countable arity. Furthermore, we show that the…

Category Theory · Mathematics 2025-01-14 Marco Abbadini

We extend Barwick's and Haugseng's construction of the double $\infty$-category of spans in a pullback-complete $\infty$-category $\mathfrak{C}$ to more general shapes: for a large class of algebraic patterns $\mathfrak{P}$, we define a…

Category Theory · Mathematics 2025-12-01 David Kern

We investigate $\mathrm{LMod}_{R}(\mathcal{V})$-enriched $\infty$-categories, where $R$ is an $\mathbb{E}_2$-ring in a presentable $\mathbb{E}_2$-monoidal $\infty$-category $\mathcal{V}$, using $\mathcal{V}$-enriched $\infty$-category…

Category Theory · Mathematics 2025-02-25 Matteo Doni

We define fully exact module categories, a subclass of exact module categories over a finite braided tensor category that is stable under the relative Deligne product. In contrast, we demonstrate with examples in both zero and non-zero…

Quantum Algebra · Mathematics 2026-01-30 Azat M. Gainutdinov , Robert Laugwitz

We describe free rigid commutative algebras in $2$-presentably symmetric monoidal $(\infty,2)$-categories as oplax colimits over the $1$-dimensional framed cobordism category. The special case of the $(\infty,2)$-category…

Category Theory · Mathematics 2026-04-03 Maxime Ramzi