ψ-I-CLOSED SET, WEAKLY ψ-I-CLOSED SET AND CONTRA ψ-I-CONTINUOUS MAPPING IN IDEAL TOPOLOGICAL SPACES
نویسندگان
چکیده
منابع مشابه
Selections on Ψ - spaces
We show that if A is an uncountable AD (almost disjoint) family of subsets of ω then the space Ψ(A) does not admit a continuous selection; moreover, if A is maximal then Ψ(A) does not even admit a continuous selection on pairs, answering thus questions of T. Nogura.
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ژورنال
عنوان ژورنال: Poincare Journal of Analysis and Applications
سال: 2020
ISSN: 2349-6789,2349-6797
DOI: 10.46753/pjaa.2020.v07i01.002