English

Various $S(n)$-closednesses in $S(n)$-spaces with examples

General Topology 2025-08-14 v1

Abstract

In this paper we continue to study various types of closures in S(n)S(n)-spaces. The main results are related to the construction and illustration of examples that allow us to understand the relationship between S(n)S(n)-closed, S(n)S(n)-θ\theta-closed, weakly S(n)S(n)-closed and weakly S(n)S(n)-θ\theta-closed spaces for each nNn\in \mathbb{N}. The relation of these classes in Lindel\"{o}f spaces is shown. Some of the solved problems formulated by D. Dikranjan and E. Giuli are presented in the examples.

Keywords

Cite

@article{arxiv.2508.09572,
  title  = {Various $S(n)$-closednesses in $S(n)$-spaces with examples},
  author = {Alexander V. Osipov},
  journal= {arXiv preprint arXiv:2508.09572},
  year   = {2025}
}

Comments

19 pages, 10 figures, 2 diagrams

R2 v1 2026-07-01T04:47:40.646Z