定義
For given closed set F and semiopen cover U of F, there exists a finite subfamily V of U such that the closures of the members of V covers F.
出典
G.L. Garg and D. Sivaraj, On Sc-compact and s-closed spaces, Boll. UMI (6), 3-B (1984), 321-32.
S.B. Navalagi, Definition bank in general topology, http://at.yorku.ca/i/d/e/b/75.htm