Caldas, M.; Jafari, S. On \(\delta D\)-sets and associated weak separation axioms. (English) Zbl 1185.54024 Bull. Malays. Math. Sci. Soc. (2) 25, No. 2, 173-185 (2002). Summary: N. V. Velichko [Am. Math. Soc., Transl., II. Ser. 78, 103–118 (1968); translation from Mat. Sb., n. Ser. 70(112), 98–112 (1966; Zbl 0178.56503)] introduced the notions of \(\delta\)-open sets and \(\delta\)-closure. In this paper, we introduce some weak separation axioms by utilizing sets and the operator. Cited in 1 Document MSC: 54D15 Higher separation axioms (completely regular, normal, perfectly or collectionwise normal, etc.) Citations:Zbl 0178.56503 PDFBibTeX XMLCite \textit{M. Caldas} and \textit{S. Jafari}, Bull. Malays. Math. Sci. Soc. (2) 25, No. 2, 173--185 (2002; Zbl 1185.54024) Full Text: EuDML EMIS