Khedr, F. H.; Sayed, O. R. Delta generalized closed and generalized delta closed sets in bitopological spaces. (English) Zbl 1499.54034 Univers. J. Math. Math. Sci. 14, No. 1, 13-28 (2021). MSC: 54A10 54C05 54E55 PDFBibTeX XMLCite \textit{F. H. Khedr} and \textit{O. R. Sayed}, Univers. J. Math. Math. Sci. 14, No. 1, 13--28 (2021; Zbl 1499.54034) Full Text: DOI
Sayed, Osama Rashed; El-Sanousy, El-Sayed; Sayed, Yaser Hassanein Ragheb Separation axioms in \((L,M)\)-fuzzy topology \((L,M)\)-fuzzy convexity spaces. (English) Zbl 1488.54034 Ann. Fuzzy Math. Inform. 21, No. 1, 93-103 (2021). MSC: 54A40 PDFBibTeX XMLCite \textit{O. R. Sayed} et al., Ann. Fuzzy Math. Inform. 21, No. 1, 93--103 (2021; Zbl 1488.54034) Full Text: DOI
Sayed, O. R.; Khalil, A. M. Some properties of soft \(\theta\)-topology. (English) Zbl 1348.54004 Hacet. J. Math. Stat. 44, No. 5, 1133-1145 (2015). MSC: 54A05 54C08 54C10 54D10 PDFBibTeX XMLCite \textit{O. R. Sayed} and \textit{A. M. Khalil}, Hacet. J. Math. Stat. 44, No. 5, 1133--1145 (2015; Zbl 1348.54004) Full Text: DOI
Baki, S. A. Abd-El; Sayed, O. R. On special operations on \(\Omega\)-closeness on topological spaces. (English) Zbl 1327.54008 Asian-Eur. J. Math. 8, No. 3, Article ID 1550059, 11 p. (2015). MSC: 54A05 54C08 PDFBibTeX XMLCite \textit{S. A. A. E. Baki} and \textit{O. R. Sayed}, Asian-Eur. J. Math. 8, No. 3, Article ID 1550059, 11 p. (2015; Zbl 1327.54008) Full Text: DOI
Sayed, O. R. On preserving \(\Omega s\)-closeness in topological spaces. (English) Zbl 1340.54009 Acta Univ. Apulensis, Math. Inform. 39, 85-97 (2014). MSC: 54A05 54C08 54D05 PDFBibTeX XMLCite \textit{O. R. Sayed}, Acta Univ. Apulensis, Math. Inform. 39, 85--97 (2014; Zbl 1340.54009)
Sayed, O. R. Supra pre-open sets and supra pre-continuity on topological spaces. (English) Zbl 1265.54078 Sci. Stud. Res., Ser. Math. Inform. 20, No. 2, 79-88 (2010). MSC: 54C08 54A05 PDFBibTeX XMLCite \textit{O. R. Sayed}, Sci. Stud. Res., Ser. Math. Inform. 20, No. 2, 79--88 (2010; Zbl 1265.54078)
Sayed, O. R.; Noiri, Takashi On supra \(b\)-open sets and supra \(b\)-continuity on topological spaces. (English) Zbl 1213.54008 Eur. J. Pure Appl. Math. 3, No. 2, 295-302 (2010). MSC: 54A05 54C08 PDFBibTeX XMLCite \textit{O. R. Sayed} and \textit{T. Noiri}, Eur. J. Pure Appl. Math. 3, No. 2, 295--302 (2010; Zbl 1213.54008) Full Text: Link