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ModCat (changes) in nLab

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Context

Categories of categories

Model category theory

model category, model $\infty$-category

Definitions

Morphisms

Universal constructions

Refinements

Producing new model structures

Presentation of (∞,1)(\infty,1)-categories

Model structures

for ∞\infty-groupoids

for ∞-groupoids

for equivariant ∞\infty-groupoids

for rational ∞\infty-groupoids

for rational equivariant ∞\infty-groupoids

for nn-groupoids

for ∞\infty-groups

for ∞\infty-algebras

general ∞\infty-algebras

specific ∞\infty-algebras

for stable/spectrum objects

for (∞,1)(\infty,1)-categories

for stable (∞,1)(\infty,1)-categories

for (∞,1)(\infty,1)-operads

for (n,r)(n,r)-categories

for (∞,1)(\infty,1)-sheaves / ∞\infty-stacks

Contents

Idea

There are several versions of a (very large) 2-category of model categories, depending on which notion of transformation of adjoints one takes to be the 2-morphisms between 1-morphisms given by Quillen functors.

One choice is to consider 2-morphisms to be conjugate transformations of adjoints between Quillen adjunctions [[Hovey (1999), p. 24](#Hovey99), cf. also Harpaz & Prasma (2015), Def. 2.5.3], such that forgetting the model category-structure is a forgetful 2-functor to $Cat_{Adj}$:

ModCat⟶Cat Adj⟶Cat. ModCat \longrightarrow Cat_{Adj} \longrightarrow Cat \,.

Therefore a pseudofunctor ℬ⟶Cat\mathcal{B} \longrightarrow Cat which factors through ModCatModCat this way has as Grothendieck construction a bifibration of model categories. Under good conditions, the domain of this bifibration carries itself an induced model category structure, see at model structure on Grothendieck constructions.

(n+1,r+1)(n+1,r+1)-categories of (n,r)-categories

References

The 2-category of model categories, left-pointing Quillen adjunctions and conjugate transformations of adjoints is considered in:

Last revised on September 29, 2023 at 16:59:17. See the history of this page for a list of all contributions to it.