A note on nowhere dense sets in
Petr Simon (1990)
Commentationes Mathematicae Universitatis Carolinae
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Displaying similar documents to “A note on almost disjoint refinement”
A note on nowhere dense sets in
On saturated almost disjoint families
András Hajnal, István Juhász, Lajos Soukup (1987)
Commentationes Mathematicae Universitatis Carolinae
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Hausdorff gaps reconstructed from Luzin gaps
Piotr Kalemba, Szymon Plewik (2009)
Acta Universitatis Carolinae. Mathematica et Physica
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Almost disjoint families and property (a)
Paul Szeptycki, Jerry Vaughan (1998)
Fundamenta Mathematicae
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We consider the question: when does a Ψ-space satisfy property (a)? We show that if then the Ψ-space Ψ(A) satisfies property (a), but in some Cohen models the negation of CH holds and every uncountable Ψ-space fails to satisfy property (a). We also show that in a model of Fleissner and Miller there exists a Ψ-space of cardinality which has property (a). We extend a theorem of Matveev relating the existence of certain closed discrete subsets with the failure of property (a). ...
Application of base tree theorem
M. Machura, Szymon Plewik (2000)
Acta Universitatis Carolinae. Mathematica et Physica
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