S. JAFARI 1, N. RAJESH 2 1. College of Vestsjaelland South, Department of Mathematics, Herrestraede, 11, 4200 Slagelse, Denmark, e-mail : jafaripersia@gmail.com
2. Rajah Serfoji Govt. College, Department of Mathematics, Thanjavur-613005, Tamilnadu, India, e-mail: nrajesh topology@yahoo.co.in
In this paper, we introduce and study the concept of qI-open set. Based on this new concept, we define new classes of functions, namely qI-continuous functions, qI-open functions and qI-closed functions, for which we prove characterization theorems.
