countably compact set

countably compact set

[′kau̇nt·ə·blē ‚käm‚pakt ′set]
(mathematics)
A set with the property that every cover with countably many open sets contains a finite number of sets which is also a cover.
References in periodicals archive ?
On the other hand a topological space X is angelic if relatively countably compact sets in X are relatively compact and for every relatively compact subset A of X each point of [bar.