γ*-SEMI-OPEN SETS IN TOPOLOGICAL SPACES

The concept of generalized open sets in generalized topological spaces was introduced by A. Csaszar [6,7]. In this paper, we introduce the concept of γ*-semi-open sets and investigate the related topological properties of the associated topologies SOγ*(X) and τγ. We also introduce the concepts of -sets and Λsγ-sets which generalize g· Λs-sets and g· νs-sets respectively introduced by Minguel Caldas and Julian Dontchev [5].