- Current Issue - Ahead of Print Articles - All Issues - Search - Open Access - Information for Authors - Downloads - Guideline - Regulations ㆍPaper Submission ㆍPaper Reviewing ㆍPublication and Distribution - Code of Ethics - For Authors ㆍOnline Submission ㆍMy Manuscript - For Reviewers - For Editors
 On some new maximal and minimal sets via {$\theta$}-open sets Commun. Korean Math. Soc. 2010 Vol. 25, No. 4, 623-628 https://doi.org/10.4134/CKMS.2010.25.4.623Printed December 1, 2010 Miguel Caldas, Saeid Jafari, and Seithuti P. Moshokoa Rua M\'{a}rio Santos Braga, s/n, Oester Farimagsgade 5, Building 26, P.O. Box 392 Abstract : Nakaoka and Oda (\cite{CAL1} and \cite{DUN1}) introduced the notion of maximal open sets and minimal closed sets in topological spaces. In this paper, we introduce new classes of sets called maximal $\theta$-open sets, minimal $\theta$ -closed sets, $\theta$-semi maximal open and $\theta$-semi minimal closed and investigate some of their fundamental properties. Keywords : topological space, maximal open sets, minimal closed sets, $\theta$-open sets, $\theta$-semi maximal open sets MSC numbers : Primary 54B05, 54C08; Secondary 54D05 Downloads: Full-text PDF

 Copyright © Korean Mathematical Society. The Korea Science Technology Center (Rm. 411), 22, Teheran-ro 7-gil, Gangnam-gu, Seoul 06130, Korea Tel: 82-2-565-0361  | Fax: 82-2-565-0364  | E-mail: paper@kms.or.kr   | Powered by INFOrang Co., Ltd