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Part of higher category theory that for instance in Algebraic Topology enables us to capture finer homotopic distinctions. As in say Eilenberg-Maclane spaces.

10 votes
1 answer
392 views

Definition of $Fun^G( \mathcal C, \mathcal D)$ in the setting of quasicategories

Our research group is currently going through the paper by Thomas Nikolaus and Peter Scholze On Topological Cyclic Homology and in the Appendix B, Proposition B.5., they use the notation $Fun^{B \math …
Georg Lehner's user avatar
  • 2,303
1 vote

Commuting homotopy colimits and arbitrary products in spaces

I will answer my own question, in hope that it is helpful to someone. Given a functor $X:D \rightarrow Spc$ of $\infty$-categories, we can take the unstraightening of $X$ (the appropriate generalizati …
Georg Lehner's user avatar
  • 2,303
6 votes
1 answer
306 views

Commuting homotopy colimits and arbitrary products in spaces

Let $X : D \rightarrow Spc$ be a diagram with values in the $\infty$-category of spaces and $I$ some (discrete) set, not necessarily finite. ($D$ can be a 1-category if that makes statements easier, b …
Georg Lehner's user avatar
  • 2,303
3 votes

Is there an ∞-categorical interpretation of the Quillen S⁻¹S construction?

Consider an $E_n$-monoid X. We can deloop $X$ to an $\infty$-category $\mathbf{B}X$. There's a natural functor $X^\circlearrowleft : \mathbf{B}X \rightarrow \text{Spc}$ given by the left action of $X$ …
Georg Lehner's user avatar
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