Ayache, Ahmed; Echi, Othman; Khalfallah, Adel Subrings of a power set and clopen topologies. (English) Zbl 1486.13005 J. Algebra Appl. 20, No. 12, Article ID 2150224, 13 p. (2021). Reviewer: Dario Spirito (Padova) MSC: 13A15 13F30 54F65 PDFBibTeX XMLCite \textit{A. Ayache} et al., J. Algebra Appl. 20, No. 12, Article ID 2150224, 13 p. (2021; Zbl 1486.13005) Full Text: DOI
Ayache, Ahmed; Echi, Othman The envelope of a subcategory in topology and group theory. (English) Zbl 1145.18300 Int. J. Math. Math. Sci. 2005, No. 21, 3387-3404 (2005). MSC: 18B30 20J15 54B30 PDFBibTeX XMLCite \textit{A. Ayache} and \textit{O. Echi}, Int. J. Math. Math. Sci. 2005, No. 21, 3387--3404 (2005; Zbl 1145.18300) Full Text: DOI EuDML