The number of cofinal ultrafilters

DOI10.1016/0166-8641(91)90075-WzbMath0739.54008OpenAlexW2094656701MaRDI QIDQ1814164

Eric K. van Douwen

Publication date: 25 June 1992

Published in: Topology and its Applications (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1016/0166-8641(91)90075-w

zbMATH Keywords

cardinality of the set of all cofinal ultrafilters

Mathematics Subject Classification ID

Extensions of spaces (compactifications, supercompactifications, completions, etc.) (54D35) Special constructions of topological spaces (spaces of ultrafilters, etc.) (54D80) Ordinal and cardinal numbers (03E10)

Related Items (6)

On the extreme non‐Arens regularity of Banach algebras ⋮ Orthogonal \(\ell_1\)-sets and extreme non-Arens regularity of preduals of von Neumann algebras ⋮ In memoriam: Eric Karl van Douwen (1946-1987) ⋮ Weak factorizations of operators in the group von Neumann algebras of certain amenable groups and applications ⋮ The size of the quotient LUC(G)/UC(G) ⋮ On ideals in the bidual of the Fourier algebra and related algebras

Cites Work

• Certain functionals on \(l_\infty\)

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