English

Definable quotients in locally o-minimal structures

Logic 2026-01-09 v1

Abstract

Let F=(F,+.,<,0,1,)\mathcal F=(F, +. \cdot, <, 0, 1, \dots) be a definably complete locally o-minimal expansion of an ordered field. We demonstrate the existence of definable quotients of definable sets by definable equivalence relations when several technical conditions are satisfied. These conditions are satisfied when XX is a locally closed definable subset of FnF^n and there is a definable proper action of a definable group GG on XX.

Keywords

Cite

@article{arxiv.2212.06401,
  title  = {Definable quotients in locally o-minimal structures},
  author = {Masato Fujita and Tomohiro Kawakami},
  journal= {arXiv preprint arXiv:2212.06401},
  year   = {2026}
}
R2 v1 2026-06-28T07:32:01.890Z