Homology, Homotopy and Applications

Volume 18 (2016)

Number 1

Equivariant $\Gamma$-spaces

Pages: 295 – 324

DOI: https://dx.doi.org/10.4310/HHA.2016.v18.n1.a16


Dominik Ostermayr (Mathematical Institute, University of Cologne, Germany)


The aim of this note is to provide a comprehensive treatment of the homotopy theory of $\Gamma \textrm{-}G$-spaces for $G$ a finite group. We introduce two level and stable model structures on $\Gamma \textrm{-}G$-spaces and exhibit Quillen adjunctions to $G$-symmetric spectra with respect to a flat level and a stable flat model structure, respectively. Then we give a proof that $\Gamma \textrm{-}G$-spaces model connective equivariant stable homotopy theory along the lines of the proof in the non-equivariant setting given by Bousfield and Friedlander. Furthermore, we study the smash product of $\Gamma \textrm{-}G$-spaces and show that the functor from $\Gamma \textrm{-}G$-spaces to G-symmetric spectra commutes with the derived smash product. Finally, we show that there is a good notion of geometric fixed points for $\Gamma \textrm{-}G$-spaces.


equivariant homotopy theory, infinite loop spaces

2010 Mathematics Subject Classification

55P47, 55P91

Published 31 May 2016