A genuine equivariant recognition principle for finite groups
Abstract
For a finite group and a finite dimensional real -representation, there is a -operad defined using embeddings of -framed -disks such that for any based -space , there is a naturally defined -algebra structure on the -fold space . Given an -algebra in -spaces and a subgroup of , the fixed points carry the structure of an -algebra in spaces. We prove that an -algebra is equivalent to a -fold loop space if and only if is group-like for all such that . This generalizes a result by Guillou and May by removing the assumption that contains a trivial summand. They observed that equivariant recognition principle follows from an equivariant version of the approximation theorem, stating that is the free group-like -algebra on a based -space . This has been proven by Hauschild in the case that contains a trivial summand and by Rourke and Sanderson in the case that is -connected. Our proof proceeds by showing that the equivariant approximation theorem holds for all -representations and all based -spaces .
Cite
@article{arxiv.2508.04421,
title = {A genuine equivariant recognition principle for finite groups},
author = {Branko Juran},
journal= {arXiv preprint arXiv:2508.04421},
year = {2025}
}
Comments
25 pages, comments welcome