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Second-countable space
Y 80%
Topological space whose topology has a countable base
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Subclasses 1
Influencing rating
Y 80%
Topological manifold
Type of topological space
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Wikipedia

In topology, a second-countable space, also called a completely separable space, is a topological space whose topology has a countable base. More explicitly, a topological space

Subclass of
Separable space
First-countable space
Lindelöf space
References
Wikidata