Cardinalities and ranks of -bases in topological spaces
Petr A. Biryukov (1980)
Commentationes Mathematicae Universitatis Carolinae
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Petr A. Biryukov (1980)
Commentationes Mathematicae Universitatis Carolinae
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S. A. Peregudov (1997)
Commentationes Mathematicae Universitatis Carolinae
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The Noetherian type of topological spaces is introduced. Connections between the Noetherian type and other cardinal functions of topological spaces are obtained.
Aarno Hohti, Jan Pelant (1985)
Fundamenta Mathematicae
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Hozo, Iztok (1995)
The Electronic Journal of Combinatorics [electronic only]
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William Wistar Comfort (1988)
Commentationes Mathematicae Universitatis Carolinae
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Piotr Kalemba, Szymon Plewik (2010)
Open Mathematics
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Countable products of finite discrete spaces with more than one point and ideals generated by Marczewski-Burstin bases (assigned to trimmed trees) are examined, using machinery of base tree in the sense of B. Balcar and P. Simon. Applying Kulpa-Szymanski Theorem, we prove that the covering number equals to the additivity or the additivity plus for each of the ideals considered.
Gerald Sacks (1979)
Fundamenta Mathematicae
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