On the cardinality of functionally Hausdorff spaces
Alessandro Fedeli (1996)
Commentationes Mathematicae Universitatis Carolinae
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In this paper two new cardinal functions are introduced and investigated. In particular the following two theorems are proved: (i) If is a functionally Hausdorff space then ; (ii) Let be a functionally Hausdorff space with . Then there is a subset of such that and .