Last-modified: 2010-12-04 (土) 16:09:15
- A topological space X is lightly compact if any countable open cover of X has a finite subfamily the closures of whose members cover X.
- Abd El-Monsef, M. E.(ET-TANT) and Kozae, A. M.(ET-TANT),Remarks on $s$-closed spaces (Arabic summary), Qatar Univ. Sci. Bull. 6 (1986), 11--21.