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For questions involving one or more categorical dimensions, or involving homotopy coherent categorical structures.

5 votes
0 answers
312 views

Tensor product of t-structures compatible with filtered colimits

Let $C,D$ be two stable presentable $(\infty,1)$-categories, equipped with accessible t-structures. Then you can define an accessible t-structure on $C\otimes D$ by having $(C\otimes D)_{\geq 0}$ be g …
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10 votes

Why do we care about $(\infty,2)$-categories?

One place where $(\infty,2)$-categories shows up is the geometric Langlands program. (As in David Ben-Zvi's comment, this is again related to the TFT example.) Indeed, local geometric Langlands is oft …
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  • 5,958
8 votes
Accepted

Remark 2.4.1.4 Higher Topos Theory

Let's see what the data of a diagram \begin{matrix} \partial\Delta^{n-2}&{\to}&X_{/f}\\ \downarrow &&\downarrow\\ \Delta^{n-2}&{\to}&X_{/y}\times_{S_{/p(y)}}S_{p(f)}\end{matrix} translates to. I cl …
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39 votes
2 answers
2k views

What parts of the theory of quasicategories have been simplified since the publication of HTT?

It has been almost ten years since Lurie published Higher Topos Theory, where (following Joyal and probably others) he set up foundations for higher category theory via quasicategories. My impression …
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