International Journal of Mathematics and Mathematical Sciences
Volume 2007 (2007), Article ID 040469, 13 pages
Research Article

Contra-ω-Continuous and Almost Contra-ω-Continuous

Ahmad Al-Omari and Mohd Salmi Md Noorani

School of Mathematical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia

Received 29 May 2007; Accepted 31 July 2007

Academic Editor: Sehie Park

Copyright © 2007 Ahmad Al-Omari and Mohd Salmi Md Noorani. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The notion of contra continuous functions was introduced and investigated by Dontchev. In this paper, we apply the notion of ω-open sets in topological space to present and study a new class of called almost contra ω-continuous functions as a new generalization of contra continuity.