English

Non-Hausdorff $T_1$ Properties

General Topology 2024-04-02 v2

Abstract

Several weakenings of the T2T_2 property for topological spaces, including kk-Hausdorff, KCKC, weakly Hausdorff, semi-Hausdorff, RCRC, and USUS, have been studied by mathematicians. Here we provide a complete survey of how these properties do or do not relate to one another, including several new results to fill in the gaps in the existing literature, motivated by the use of a community-maintained database of topological spaces and their properties.

Keywords

Cite

@article{arxiv.2312.08328,
  title  = {Non-Hausdorff $T_1$ Properties},
  author = {Steven Clontz},
  journal= {arXiv preprint arXiv:2312.08328},
  year   = {2024}
}
R2 v1 2026-06-28T13:49:58.822Z