English

A Classifying groupoid for compact Hausdorff locales

Category Theory 2023-10-13 v1

Abstract

We construct a localic groupoid GKH\mathbb{G}_{KH} such that for any locale XX the category of compact Hausdorff locales in the topos of sheaves over XX is equivalent to a category whose objects are principal GKH\mathbb{G}_{KH}-bundles over XX and whose morphisms are S\mathbb{S}-homotopies (where S\mathbb{S} is the Sierpi\'{n}ski locale). This result can be intuitively viewed as the compact Hausdorff dual of the well known result from topos theory that there is an object classifier.

Keywords

Cite

@article{arxiv.2310.07785,
  title  = {A Classifying groupoid for compact Hausdorff locales},
  author = {Simon Henry and Christopher Townsend},
  journal= {arXiv preprint arXiv:2310.07785},
  year   = {2023}
}

Comments

11 pages

R2 v1 2026-06-28T12:47:47.970Z