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Homotopy theory, homological algebra, algebraic treatments of manifolds.

4 votes
1 answer
345 views

Contractibility of the category of cosimplicial resolutions

Let $\gamma : \mathcal{C} \to \mathcal{M}$ be a functor and define a cosimplicial resoultion of $\gamma$ as a functor $\Gamma: \mathcal{C} \to \mathcal{M}^{\Delta}$ such that $\Gamma C$ is Reedy cofi …
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4 votes
1 answer
280 views

When are filtered colimits of (trivial) cofibrations still (trivial) cofibrations?

Let $\mathcal{M}$ be a locally finitely presentable model category, cofibrantly generated by two sets $\mathcal{I}$ and $\mathcal{J}$ of cofibrations and trivial cofibrations with presentable domain …
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4 votes
0 answers
173 views

Is the Reedy model structure cofibrantly generated?

I am reading about the Reedy model structure from Hovey's book and I was wondering if the Reedy model structure on $\mathcal{M}^{\Delta}$ is cofibrantly generated by a small set of arrows and permits …
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4 votes
2 answers
317 views

Quillen pairs / $\infty$-adjunctions / adjunctions of homotopy categories

Some of the examples of $\infty$-categories are those arising from model categories. I would like to ask: what is the relationship between Quillen adjunctions between model categories and adjoint pair …
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14 votes
2 answers
843 views

sSet-enriched categories, quasi-categories and the model-independent theory

sSet-enriched categories are one possible model for $(\infty,1)$-categories, by the work of Bergner and others. They are probably the most important model from the point of view of getting actual exam …
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