EUDML | Clusters and ultrafilters.

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Displaying similar documents to “Clusters and ultrafilters.”

Proximity approach to extension problems

M. Gagrat, S. Naimpally (1971)

Fundamenta Mathematicae

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Completely regular proximities and RC-proximities

Douglas Harris (1974)

Fundamenta Mathematicae

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Real maximal round filters in proximity spaces

Don Mattson (1973)

Fundamenta Mathematicae

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On the extensibility of closed filters in T $_{1}$ spaces and the existence of well orderable filter bases

Kyriakos Keremedis, Eleftherios Tachtsis (1999)

Commentationes Mathematicae Universitatis Carolinae

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We show that the statement CCFC = “” is equivalent to the CMC and, the axiom of choice AC is equivalent to the statement CFE $_{0}$ = “”. We also show that AC is equivalent to each of the assertions: “”, “” and “”.

Thin ultrafilters

Jana Flašková (2005)

Acta Universitatis Carolinae. Mathematica et Physica

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