Two set-theoretic problems in topology
Juhász, I.
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Displaying similar documents to “Extraresolvability of balleans”
Two set-theoretic problems in topology
Covering of a space by nowhere dense sets
Petr Simon (1977)
Commentationes Mathematicae Universitatis Carolinae
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On the cardinality of Hausdorff spaces
Alessandro Fedeli (1998)
Commentationes Mathematicae Universitatis Carolinae
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The aim of this paper is to show, using the reflection principle, three new cardinal inequalities. These results improve some well-known bounds on the cardinality of Hausdorff spaces.