Results 1 to 10 of about 4,921 (52)

A generalization of Ohkawa's theorem [PDF]

open access: yes, 2013
A theorem due to Ohkawa states that the collection of Bousfield equivalence classes of spectra is a set. We extend this result to arbitrary combinatorial model categories.Comment: 13 pages; consequences in motivic homotopy theory have been ...
Casacuberta, Carles   +2 more
core   +9 more sources

Class-locally presentable and class-accessible categories

open access: yesJournal of Pure and Applied Algebra, 2012
In this paper the authors consider generalisations of accessibility and local presentability for categories. A category is accessible if it has a completeness property and if every object is a colimit in a suitable way of a set of suitable objects. For class-accessibility one allows a proper class of objects rather than a set.
Chorny, B., Rosický, J.
openaire   +1 more source

Simplicial presheaves of coalgebras [PDF]

open access: yes, 2011
The category of simplicial R-coalgebras over a presheaf of commutative unital rings on a small Grothendieck site is endowed with a left proper, simplicial, cofibrantly generated model category structure where the weak equivalences are the local weak ...
Brown   +11 more
core   +1 more source

Locally class-presentable and class-accessible categories

open access: yes, 2011
We generalize the concepts of locally presentable and accessible categories. Our framework includes such categories as small presheaves over large categories and ind-categories. This generalization is intended for applications in the abstract homotopy theory.
Chorny, Boris, Rosicky, Jiri
openaire   +2 more sources

Definable orthogonality classes in accessible categories are small [PDF]

open access: yes, 2011
We lower substantially the strength of the assumptions needed for the validity of certain results in category theory and homotopy theory which were known to follow from Vopenka's principle.
Bagaria, Joan   +3 more
core   +2 more sources

Lifting accessible model structures

open access: yes, 2018
A Quillen model structure is presented by an interacting pair of weak factorization systems. We prove that in the world of locally presentable categories, any weak factorization system with accessible functorial factorizations can be lifted along either ...
Garner, Richard   +2 more
core   +1 more source

Homotopical Algebraic Context over Differential Operators [PDF]

open access: yes, 2017
Building on previous works, we show that the category of non-negatively graded chain complexes of $D_X$-modules -- where $X$ is a smooth affine algebraic variety over an algebraically closed field of characteristic zero -- fits into a homotopical ...
Di Brino, Gennaro   +2 more
core   +2 more sources

Injective and Projective Model Structures on Enriched Diagram Categories

open access: yes, 2018
In the enriched setting, the notions of injective and projective model structures on a category of enriched diagrams also make sense. In this paper, we prove the existence of these model structures on enriched diagram categories under local ...
Moser, Lyne
core   +1 more source

Hopf measuring comonoids and enrichment

open access: yes, 2016
We study the existence of universal measuring comonoids $P(A,B)$ for a pair of monoids $A$, $B$ in a braided monoidal closed category, and the associated enrichment of a category of monoids over the monoidal category of comonoids. In symmetric categories,
Franco, Ignacio Lopez   +2 more
core   +1 more source

A necessary and sufficient condition for induced model structures

open access: yes, 2017
A common technique for producing a new model category structure is to lift the fibrations and weak equivalences of an existing model structure along a right adjoint.
Hess, Kathryn   +3 more
core   +1 more source

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