English

Partial actions of groups on profinite spaces

General Topology 2023-02-15 v3 Functional Analysis

Abstract

We show that for a partial action η\eta with closed domain of a compact group GG on a profinite space XX the space of orbits X/ ⁣GX/\!\sim_G is profinite, this leads to the fact that when GG is profinite the enveloping space XGX_G is also profinite. Moreover, we provide conditions for the induced quotient map πG:XX/ ⁣G\pi_G: X\to X/\!\sim_G of η\eta to have a continuous section. Relations between continuous sections of πG\pi_G and continuous sections of the quotient map induced by the enveloping action of η\eta are also considered. At the end of this work we prove that the category of actions on profinite spaces with countable number of clopen sets is reflective in the category of actions of compact Hausdorff spaces having countable number of clopen sets.

Keywords

Cite

@article{arxiv.2101.04779,
  title  = {Partial actions of groups on profinite spaces},
  author = {Luis Martínez and Andrés Villamizar and Héctor Pinedo},
  journal= {arXiv preprint arXiv:2101.04779},
  year   = {2023}
}
R2 v1 2026-06-23T22:05:44.133Z