H. H. ALJARRAH 1, M. S. M. NOORANI 2 AND T. NOIRI 3 1, 2. School of Mathematical Sciences, Faculty of Science and Technology,
Universiti Kebangsaan Malaysia, 43600 UKM, Selangor Darul Ehsan,
MALAYSIA,
e-mail: hiamaljarah@yahoo.com, msn@ukm.my
3. 2949-1 Shiokita-cho, Hinagu, Yatsushiro-shi, Kumamoto-ken,869-5142
JAPAN
e-mail: t.noiri@nifty.com
The separation axioms are important and interesting concepts in topological spaces. In this paper, we introduce and investigate some weak separation axioms by using the notion of ωβ-open set.