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We show that basic homotopical notions such as homotopy sets and groups, connected and truncated maps, cellular constructions and skeleta, etc., extend to the setting of $(\infty,\infty)$-categories, as well as to presentable categories…

Algebraic Topology · Mathematics 2026-04-16 David Gepner , Hadrian Heine

In this paper we construct a cofibrantly generated model category structure on the category of all small symmetric multicategories enriched in simplicial sets.

Algebraic Topology · Mathematics 2011-11-18 Marcy Robertson

There are infinitely many variants of the notion of Kan fibration that, together with suitable choices of cofibrations and the usual notion of weak equivalence of simplicial sets, satisfy Quillen's axioms for a homotopy model category. The…

Category Theory · Mathematics 2008-10-29 Tibor Beke

This paper considers a class of coalgebras over the Barratt-Eccles operad and shows that they classify Z-completions of pointed, reduced simplicial sets. As a consequence, they encapsulate the homotopy types of nilpotent simplicial sets.…

Algebraic Topology · Mathematics 2013-07-23 Justin R. Smith

In this paper, we construct a model structure for $(\infty,1)$-categories on the category of simplicial spaces, whose fibrant objects are the Segal spaces. In particular, we show that it is Quillen equivalent to the models of…

Algebraic Topology · Mathematics 2025-12-01 Lyne Moser , Joost Nuiten

We show that a category $\mathscr{M}$ equipped with a model structure defined by a proper, locally small class of orbits $\mathscr{O}$ is Quillen equivalent to the category of small relative presheaves…

Algebraic Topology · Mathematics 2015-10-20 Boris Chorny

This paper is devoted to constructing simple modules of the planar Galilean conformal algebra. We study the tensor products of finitely many simple $\mathcal{U}(\mathcal{H})$-free modules with an arbitrary simple restricted module, where…

Representation Theory · Mathematics 2025-07-30 Dashu Xu

In the paper the notion of truncating twisting function $\tau :X\to Q$ from a simplicial set $X$ to a cubical set $Q$ and the corresponding notion of twisted Cartesian product of these sets $X\times_{\tau}Q$ are introduced. The latter…

Algebraic Topology · Mathematics 2007-05-23 Tornike Kadeishvili , Samson Saneblidze

We introduce the notion of a logical model category which is a Quillen model category satisfying some additional conditions. Those conditions provide enough expressive power that one can soundly interpret dependent products and sums in it.…

Logic · Mathematics 2012-08-30 Peter Arndt , Chris Kapulkin

We generalize the construction of reflection functors from classical representation theory of quivers to arbitrary small categories with freely attached sinks or sources. These reflection morphisms are shown to induce equivalences between…

Algebraic Topology · Mathematics 2017-09-12 Moritz Groth , Jan Stovicek

It has been conjectured since the 1980s that Verity's $n$-complicial sets were a model for $(\infty,n)$-categories. This text is dedicated to providing a positive answer to this conjecture. The proof of this result relies on a thorough…

Category Theory · Mathematics 2024-03-14 Félix Loubaton

We construct a "diagonal" cofibrantly generated model structre on the category of simplicial objects in the category of topological categories sCat_{Top}, which is the category of diagrams [\Delta^{op}, Cat_{Top}]. Moreover, we prove that…

Algebraic Topology · Mathematics 2011-12-07 Ilias Amrani

This paper explores the relationship amongst the various simplicial and pseudo-simplicial objects characteristically associated to any bicategory C. It proves the fact that the geometric realizations of all of these possible candidate…

Algebraic Topology · Mathematics 2014-10-01 P. Carrasco , A. M. Cegarra , A. R. Garzón

We study the notion of a bifibration in simplicial sets which generalizes the classical notion of two-sided discrete fibration studied in category theory. If $A$ and $B$ are simplicial sets we equip the category of simplicial sets over…

Algebraic Topology · Mathematics 2018-07-24 Danny Stevenson

We prove the compatibility between the suspension construction and the complicial nerve of $\omega$-categories. As a motivating application, we produce a Quillen pair between the models of $(\infty,n)$-categories given by Rezk's complete…

Algebraic Topology · Mathematics 2022-06-07 Viktoriya Ozornova , Martina Rovelli

In previous work, we showed that there are appropriate model category structures on the category of simplicial categories and on the category of Segal precategories, and that they are Quillen equivalent to one another and to Rezk's complete…

Algebraic Topology · Mathematics 2013-01-04 Julia E. Bergner

For a cofibrantly generated Quillen model category, we show that the cofibrant replacement functor constructed using the small object argument admits a cotriple structure. If all acyclic cofibrations are monomorphisms, the fibrant…

Algebraic Topology · Mathematics 2007-05-23 Andrei Radulescu-Banu

This thesis is divided into two parts. In the first part, we study models of $(\infty,\omega)$-categories. The main result is to establish a Quillen equivalence between Rezk's complete Segal $\Theta$-spaces and Verity's complicial sets. In…

Category Theory · Mathematics 2023-10-13 Félix Loubaton

We study unital operator spaces endowed with a partially defined product. We give a matrix-norm characterization of such products that allows for a representation theorem where the partial product is realized as composition of operators on…

Operator Algebras · Mathematics 2025-11-07 Adam Dor-On , Travis B. Russell

Let G denote either a special orthogonal group or a symplectic group defined over the complex numbers. We prove the following saturation result for G: given dominant weights \lambda^1, ..., \lambda^r such that the tensor product…

Representation Theory · Mathematics 2011-11-24 Steven V Sam