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27 December 2025
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N 19:55 | Countably compact spaces 3 changes history +3,420 [Ai (3×)] | |||
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19:55 (cur | prev) +175 Ai talk contribs | ||||
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19:55 (cur | prev) −46 Ai talk contribs | ||||
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19:54 (cur | prev) +3,291 Ai talk contribs (Created page with "== Definition == In topological theory, a branch of mathematics, a countably compact space is a type of topological space with certain compact-like properties. Specifically, a topological space is said to be countably compact if every countable open cover has a finite subcover. This is a weaker condition than compactness, which requires that every open cover, regardless of its cardinality, has a finite subcover. == Properties == Countably compact spaces...") | |||