ON SUPERCLASSES OF δ-OPEN SETS IN
TOPOLOGICAL SPACES
Zanyar A. Ameen1, Baravan A. Asaad2, Ramadhan A. Muhammed3
1Department of Mathematics, College of Science
University of Duhok, IRAQ
2Department of Computer Science, College of Science
Cihan University-Duhok, IRAQ
2Department of Mathematics, Faculty of Science
University of Zakho, IRAQ
3Department of Mathematics, College of Basic Education
University of Duhok, IRAQ

Abstract

The paper considers properties of $\delta$-preopen, $\delta$-semiopen, $a$-open and $e^*$-open sets in topological spaces. Particularly, we extend various results concerning these types of sets and give some more new results. Furthermore, we introduce two more subclasses of $\delta$-semiopen sets, and study them.

Citation details of the article



Journal: International Journal of Applied Mathematics
Journal ISSN (Print): ISSN 1311-1728
Journal ISSN (Electronic): ISSN 1314-8060
Volume: 32
Issue: 2
Year: 2019

DOI: 10.12732/ijam.v32i2.8

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