English

Star versions of Hurewicz spaces

General Topology 2020-11-02 v2

Abstract

A space XX is said to have the set star Hurewicz property if for each nonempty subset AA of XX and each sequence (Un:nN)(\mathcal{U}_n: n \in \mathbb{N}) of sets open in XX such that for each nNn\in \mathbb N, AUn\overline{A} \subset \cup \mathcal{U}_n, there is a sequence (Vn:nN)(\mathcal{V}_n: n \in \mathbb{N}) such that for each nNn \in \mathbb{N}, Vn\mathcal{V}_n is a finite subset of Un\mathcal{U}_n and for each xAx \in A, xSt(Vn,Un)x \in {\rm St}(\cup \mathcal{V}_n, \mathcal{U}_n) for all but finitely many nn. In this paper, we investigate the relationships among set star Hurewicz, set strongly star Hurewicz and other related covering properties and study the topological properties of these topological spaces.

Keywords

Cite

@article{arxiv.2006.15380,
  title  = {Star versions of Hurewicz spaces},
  author = {Sumit Singh and Ljubisa D. R. Kocinac},
  journal= {arXiv preprint arXiv:2006.15380},
  year   = {2020}
}

Comments

11 pages; Comments are welcome