English

Generalized equivariant model structures on $\mathbf{Cat}^I$

Algebraic Topology 2016-05-26 v1 Category Theory

Abstract

Let II be a small category, C\mathcal{C} be the category Cat\mathbf{Cat}, Ac\mathbf{Ac} or Pos\mathbf{Pos} of small categories, acyclic categories, or posets, respectively. Let O\mathcal{O} be a locally small class of objects in SetI\mathbf{Set}^I such that colimIO=\mathrm{colim}_I O=* for every OOO\in \mathcal{O}. We prove that CI\mathcal{C}^I admits the O\mathcal{O}-equivariant model structure in the sense of Farjoun, and that it is Quillen equivalent to the O\mathcal{O}-equivariant model structure on sSetI\mathbf{sSet}^I. This generalizes previous results of Bohmann-Mazur-Osorno-Ozornova-Ponto-Yarnall and of May-Stephan-Zakharevich when I=GI=G is a discrete group and O\mathcal{O} is the set of orbits of GG.

Keywords

Cite

@article{arxiv.1605.07983,
  title  = {Generalized equivariant model structures on $\mathbf{Cat}^I$},
  author = {Yuzhou Gu},
  journal= {arXiv preprint arXiv:1605.07983},
  year   = {2016}
}
R2 v1 2026-06-22T14:09:31.535Z