Set-systems with restricted multiple intersections.
Grolmusz, Vince (2002)
The Electronic Journal of Combinatorics [electronic only]
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Displaying similar documents to “A note on set systems with no union of cardinality 0 modulo .”
Set-systems with restricted multiple intersections.
Almost disjoint families and “never” cardinal invariants
Charles Morgan, Samuel Gomes da Silva (2009)
Commentationes Mathematicae Universitatis Carolinae
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We define two cardinal invariants of the continuum which arise naturally from combinatorially and topologically appealing properties of almost disjoint families of sets of the natural numbers. These are the never soft and never countably paracompact numbers. We show that these cardinals must both be equal to under the effective weak diamond principle , answering questions of da Silva S.G., On the presence of countable paracompactness, normality and property in spaces from almost...
Edge decompositions of graphs with no large independent sets.
Galvin, F., Hajnal, A., Komjáth, P. (1995)
Publications de l'Institut Mathématique. Nouvelle Série
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Two set-theoretic problems in topology
Juhász, I.
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Around splitting and reaping
Jörg Brendle (1998)
Commentationes Mathematicae Universitatis Carolinae
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We prove several results on some cardinal invariants of the continuum which are closely related to either the splitting number or its dual, the reaping number .