Countably-compact space
From HandWiki
A topological space $X$ in which it is possible to extract a finite subcovering from any countable open covering of that space.
References
| [a1] | A.V. Arkhangel'skii, V.I. Ponomarev, "Fundamentals of general topology: problems and exercises" , Reidel (1984) (Translated from Russian) |
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