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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.

6 votes
0 answers
133 views

Are cofibrant objects flat with respect to Day convolution?

Question Let $\mathcal{C}$ be a small symmetric monoidal category. The category $\mathsf{sSet}^{\mathcal{C}}$ of simplicial precosheaves on $\mathcal{C}$ is a symmetric monoidal model category with r …
Ken's user avatar
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0 votes

Why is the straightening functor the analogue of the Grothendieck construction?

As Xiaowen mentions, it is probably a good idea to look at the unstraightening functor for an intuition. And while Xiaowen's answer is nice, we can be even more explicit. For simplicity, I will assume …
Ken's user avatar
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7 votes
Accepted

Reference for homotopy (co)limits of (co)chain complexes via totalization of double complexes

I wrote a note for referential purposes. I hope that this will be helpful. Arakawa, K. (2023). Homotopy Limits and Homotopy Colimits of Chain Complexes. arxiv.2310.00201
Ken's user avatar
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9 votes
1 answer
537 views

Proposition A.2.6.15 in HTT

This is a cross-post of a question in MSE. I am reading Lurie's Higher Topos Theory and I need some help to understand a part of the proof of Proposition A.2.6.15. (A.2.6.13 in the published version …
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