Subspaces of pseudoradial spaces
Martin Sleziak (2003)
Mathematica Slovaca
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Displaying similar documents to “Ordinal invariants in topology - summary”
Subspaces of pseudoradial spaces
Ordinal invariants and epimorphisms in some categories of weak Hausdorff spaces
Dikran N. Dikranjan, Eraldo Giuli (1986)
Commentationes Mathematicae Universitatis Carolinae
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Natural covers
S. P. Franklin (1969)
Compositio Mathematica
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Hausdorff Fréchet closure spaces with maximum topological defect
Riccardo Ghiloni (2002)
Bollettino dell'Unione Matematica Italiana
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It is well-known that the topological defect of every Fréchet closure space is less than or equal to the first uncountable ordinal number . In the case of Hausdorff Fréchet closure spaces we obtain some general conditions sufficient so that the topological defect is exactly . Some classical and recent results are deduced from our criterion.