Communications of the
Korean Mathematical Society CKMS

A space $X$ is $cs$-$starcompact$ if for every open cover $\mathcal U$ of $X$, there exists a convergent sequence $S$ of $X$ such that $St(S,\mathcal U)=X$, where $St(S,{\mathcal U})=\bigcup\{U\in{\mathcal U}: U\cap S\neq\emptyset\}$. In this paper, we prove the following statements: (1) There exists a Tychonoff cs-starcompact space having a regular-closed subset which is not cs-starcompact; (2) There exists a Hausdorff cs-starcompact space with arbitrary large extent; (3) Every Hausdorff centered-Lindel{\"o}f space can be embedded in a Hausdorff cs-starcompact space as a closed subspace.

Keywords: compact, countably compact, cs-starcompact

MSC numbers: 54D20, 54G20