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Separable space
Y 80%
Topological space with a dense countable subset
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Subclasses 1
Influencing rating
Y 80%
Second-countable space
Topological space whose topology has a countable base
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Wikipedia

In mathematics, a topological space is called separable if it contains a countable dense subset; that is, there exists a sequence

Subclass of
Topological space
References
Wikidata