Pseudo-open functions are monotonic decreasing for ordinal and cardinal invariants

DOI10.1016/0016-660X(78)90028-4zbMath0498.54011OpenAlexW1990684705MaRDI QIDQ3963690

James R. Boone

Publication date: 1978

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

Full work available at URL: https://doi.org/10.1016/0016-660x(78)90028-4

zbMATH Keywords

tightnessmonotonicity propertiescardinal invariantsequential orderordinal invariantcompact orderk-continuous and sequentially continuous mappingspseudo-open functions

Mathematics Subject Classification ID

Special maps on topological spaces (open, closed, perfect, etc.) (54C10) Sequential spaces (54D55) Cardinality properties (cardinal functions and inequalities, discrete subsets) (54A25) (k)-spaces (54D50)

Related Items (3)

Universal Bounds and Monotonicity of Ordinal Invariants ⋮ On open mappings, closed mappings, and ordinal invariants ⋮ Test spaces for infinite sequential order

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