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A model category is a category equipped with notions of weak equivalences, fibrations and cofibrations allowing to run arguments similar to those of classical homotopy theory.

4 votes
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About the Cole-Ström model category structure with a locally presentable category

Actually, there is an error in the Cole paper you're talking about, as recently discovered by Richard Williamson and very recently corrected by Tobi Barthel and Emily Riehl in "On the Construction of …
David White's user avatar
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2 votes
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Generating trivial cofibrations of Bousfield localization

No, definitely not! They are much more complicated to characterize. You need to take horns on the set of morphisms you just wrote down. This is all detailed carefully in Hirschhorn's book, summarized …
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4 votes
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Characterization of right properness using slice categories

This is Proposition 2.7 in Rezk's Every Homotopy Theory of Simplicial Algebras Admits a Proper Model
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3 votes

How to simplify the proof of right-properness?

You asked if you can check it for less than the collection of all weak equivalences. In A.5 of Motivic Symmetric Spectra, Jardine proves a general right properness result from Corollary A.4, which is …
David White's user avatar
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3 votes

Cube Lemma on a cofibrantly generated (almost) model category

If I understand your situation correctly, the answer is yes, the cube lemma holds, but you cannot use that to get a full model structure. Your situation often arises when trying to transfer a model st …
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5 votes

Cellular model structures on continuous functors

I am glad that by putting our heads together in Munster this week we finally have a proof and can answer this question (a full 2 years after it was asked!). The answer is yes, and I want to sketch her …
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2 votes
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Construction of combinatorial model categories with all objects fibrant

There are a ton of papers about what you are asking. Another is the thesis of Richard Williamson (arXiv:1304.0867v1). Also, Valery Isaev has a paper that produces a model structure with all objects fi …
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3 votes

A model category structure on chain complexes

The model structure you are looking for is developed in a paper by Christensen and Hovey called Quillen model structures for relative homological algebra. They go into the factorization systems in gre …
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2 votes
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A monoidal model structure on pointed spaces

Yes. According to the nLab page for the Strom model structure, this is proven in Section 6.4 of May's Concise Course in Algebraic Topology. The point is that a closed inclusion is a cofibration if and …
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1 vote

What came of the problems posed in Hovey's book chapter 8

They have certainly not all been resolved one way or the other. As the other thread points out, Tyler Lawson and others were working on this a few years ago. During my last years of grad school, I sta …
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5 votes
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Is there Jeff Smith's theorem for left semi-model structures?

Yes, and this is one of the main results in a paper I hope to put on arxiv very soon. I wrote about this result in a previous mathoverflow answer here. You are right that the way to do it is to focus …
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1 vote
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Applications of model categories

There are many references where model categories, and their connection to homology, are described more. See this MO question for a list. For the example of $Ch(R)$, there are several model structures. …
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4 votes
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Excellent monoidal model categories admit enriched fibrant replacement functors?

I think the answer is yes (to both questions). In Emily Riehl's book "Categorical homotopy theory", chapter 13 is all about the enriched small object argument. Theorem 13.2.1 on page 177 (I hope I'm l …
David White's user avatar
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6 votes

"Strøm-type" model structure on chain complexes?

Very recently a paper appeared on the arxiv by Barthel-May-Riehl which addresses this question in a very complete way. It discusses the three model structures on DG-algebras (answering the OPs questio …
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3 votes
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Alternative characterization of homotopy equivalence

EDIT: Now that the OP has edited his question to make clearer what he wants as an answer, I'm removing speculation about what he wanted. The answer is: yes, you can characterize homotopy equivalences …
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