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If a topological space X has $\aleph_1$-calibre[definition][definition], then it must be star countable?
What if the cardinality of the topological space X is additionally < = $2^{\aleph_0}$?
If a topological space X has $\aleph_1$-calibre[definition], then it must be star countable?
What if the cardinality of the topological space X is additionally < = $2^{\aleph_0}$?
If a topological space X has $\aleph_1$-calibre[definition], then it must be star countable?
What if the cardinality of the topological space X is additionally < = $2^{\aleph_0}$?
If a topological space X has $\aleph_1$-calibre[definition], then it must be star countable?
What if the cardinality of the topological space X is additionally < = $2^{\aleph_0}$?
If a topological space X has $\aleph_1$-calibre[definition], then it must be star countable?
If a topological space X has $\aleph_1$-calibre[definition], then it must be star countable?
What if the cardinality of the topological space X is additionally < = $2^{\aleph_0}$?