Definition
- A space X is countably absolutely countably compact ( = countably acc) if for every countable open cover U of X and every dense subspace D of X , there exists a finite subset B of D such that .
Remark
- See starcompact for notation.
Reference
- Song, Yan-Kui(J-SHIZS), Countable star-covering properties. (English summary) Research in general and geometric topology (Japanese) (Kyoto, 1999), Sūrikaisekikenkyūsho Kōkyūroku No. 1126 (2000), 79--87.