Geodesic
Small presentations of model categories and Vopěnka’s principle
Homology, homotopy, and applications, Tome 20 (2018) no. 1, pp. 303-328.

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We prove existence results for small presentations of model categories generalizing a theorem of D. Dugger from combinatorial model categories to more general model categories. Some of these results are shown under the assumption of Vopěnka’s principle. Our main theorem applies, in particular, to cofibrantly generated model categories where the domains of the generating cofibrations satisfy a slightly stronger smallness condition. As a consequence, assuming Vopěnka’s principle, such a cofibrantly generated model category is Quillen equivalent to a combinatorial model category. Moreover, if there are generating sets which consist of presentable objects, then the same conclusion holds without the assumption of Vopěnka’s principle. We also correct a mistake from previous work that made similar claims.
DOI : 10.4310/HHA.2018.v20.n1.a18
Classification : 18C35, 18G55, 55U35
Keywords: cofibrantly generated model category, combinatorial model category, simplicial presheaves, Vopěnka’s principle 
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     title = {Small presentations of model categories and {Vop\v{e}nka{\textquoteright}s} principle},
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G. Raptis; J. Rosický. Small presentations of model categories and Vopěnka’s principle. Homology, homotopy, and applications, Tome 20 (2018) no. 1, pp. 303-328. doi : 10.4310/HHA.2018.v20.n1.a18. http://geodesic.mathdoc.fr/articles/10.4310/HHA.2018.v20.n1.a18/

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