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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 construct a model structure on the category of cubical sets with connections whose cofibrations are the monomorphisms and whose fibrant objects are defined by the right lifting property with respect to inner open boxes, the cubical…

Algebraic Topology · Mathematics 2022-02-08 Brandon Doherty , Chris Kapulkin , Zachery Lindsey , Christian Sattler

We show that the category of algebraically cofibrant objects in a combinatorial and simplicial model category A has a model structure that is left-induced from that on A. In particular it follows that any presentable model category is…

Algebraic Topology · Mathematics 2014-09-09 Michael Ching , Emily Riehl

If all objects of a simplicial combinatorial model category \cat A are cofibrant, then there exists the homotopy model structure on the category of small functors $\sS^{\cat A}$, where the fibrant objects are homotopy functors, i.e.,…

Algebraic Topology · Mathematics 2024-07-24 Boris Chorny , David White

We prove that each of the model structures for ($n$-trivial, saturated) comical sets on the category of marked cubical sets having only faces and degeneracies (without connections) is Quillen equivalent to the corresponding model structure…

Algebraic Topology · Mathematics 2022-07-19 Brandon Doherty

We put a model structure on the category of categories internal to simplicial sets whose weak equivalences are reflected by the nerve functor to bisimplicial sets with Rezk's model structure. This model structure is shown to be Quillen…

Algebraic Topology · Mathematics 2016-10-12 Geoffroy Horel

In this paper we study the question of how to transfer homotopic structure from the category sD of simplicial objects in a fixed category D to D. To this end we use a sort of homotopy colimit s : sD --> D, which we call simple functor. For…

Algebraic Geometry · Mathematics 2011-10-12 Beatriz Rodriguez Gonzalez

In this paper we put a cofibrantly generated model category structure on the category of small simplicial categories. The weak equivalences are a simplicial analogue of the notion of equivalence of categories.

Algebraic Topology · Mathematics 2007-05-23 Julia E. Bergner

In this article, we construct a cofibrantly generated Quillen model structure on the category of small topological categories $\mathbf{Cat}_{\mathbf{Top}}$. It is Quillen equivalent to the Joyal model structure of $(\infty,1)$-categories…

Algebraic Topology · Mathematics 2011-10-13 Ilias Amrani

We produce a highly structured way of associating a simplicial category to a model category which improves on work of Dwyer and Kan and answers a question of Hovey. We show that model categories satisfying a certain axiom are Quillen…

Algebraic Topology · Mathematics 2020-01-13 Charles Rezk , Stefan Schwede , Brooke Shipley

In this article, we construct a cofibrantly generated model structure on the category of spaces stratified over a fixed poset, and show that it is Quillen-equivalent to a category of diagrams of simplicial sets. Then, considering all those…

Algebraic Topology · Mathematics 2021-03-10 Sylvain Douteau

We define a new notion of an algebraic model structure, in which the cofibrations and fibrations are retracts of coalgebras for comonads and algebras for monads, and prove "algebraic" analogs of classical results. Using a modified version…

Category Theory · Mathematics 2011-03-14 Emily Riehl

We present a family of model structures on the category of multicomplexes. There is a cofibrantly generated model structure in which the weak equivalences are the morphisms inducing an isomorphism at a fixed stage of an associated spectral…

Algebraic Topology · Mathematics 2021-01-13 Xin Fu , Ai Guan , Muriel Livernet , Sarah Whitehouse

We construct a cubical analogue of the rigidification functor from quasi-categories to simplicial categories present in the work of Joyal and Lurie. We define a functor from the category of cubical sets of Doherty-Kapulkin-Lindsey-Sattler…

Algebraic Topology · Mathematics 2024-08-28 Pierre-Louis Curien , Muriel Livernet , Gabriel Saadia

We give an example of a morphism of simplicial sets which is a monomorphism, bijective on 0-simplices, and a weak categorical equivalence, but which is not inner anodyne. This answers an open question of Joyal. Furthermore, we use this…

Algebraic Topology · Mathematics 2019-10-22 Alexander Campbell

We provide a partial solution to the problem of defining a constructive version of Voevodsky's simplicial model of univalent foundations. For this, we prove constructive counterparts of the necessary results of simplicial homotopy theory,…

Category Theory · Mathematics 2022-06-30 Nicola Gambino , Simon Henry

The category of small covariant functors from simplicial sets to simplicial sets supports the projective model structure. In this paper we construct various localizations of the projective model structure and also give a variant for…

Algebraic Topology · Mathematics 2013-09-11 Georg Biedermann , Boris Chorny , Oliver Röndigs

We give a new construction of the Joyal model structure on the category of simplicial sets, and we provide a simple characterization of the fibrations in it. We characterize the inner anodyne maps in terms of categorical equivalences and…

Algebraic Topology · Mathematics 2018-10-15 Danny Stevenson

We extend all known results about transferred model structures on algebraically cofibrant and fibrant objects by working with weak model categories. We show that for an accessible weak model category there are always Quillen equivalent…

Category Theory · Mathematics 2020-05-13 John Bourke , Simon Henry

We study properties of the cubical Joyal model structures on cubical sets by means of a combinatorial construction which allows for convenient comparisons between categories of cubical sets with and without symmetries. In particular, we…

Algebraic Topology · Mathematics 2026-02-25 Brandon Doherty
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