On W-closed sets and Ws-closed sets in topological spaces

On W-closed sets and Ws-closed sets in topological spaces

New classes of sets called W-closed sets and Ws-closed sets are introduced and studied. Also, we introduce and study W-continuous functions and Ws-continuous functions and prove pasting lemma for these functions. Moreover, we introduce classes of topological spaces W-T(1/2) and W-T(s).

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Veröffentlicht in:Acta mathematica Hungarica 2005-06, Vol.107 (4), p.307-318
Hauptverfasser: Noiri, Takashi, Sayed, Osama Rashed
Format: Artikel
Sprache:eng
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Zusammenfassung:New classes of sets called W-closed sets and Ws-closed sets are introduced and studied. Also, we introduce and study W-continuous functions and Ws-continuous functions and prove pasting lemma for these functions. Moreover, we introduce classes of topological spaces W-T(1/2) and W-T(s).
ISSN:0236-5294
DOI:10.1007/s10474-005-0198-7