Remarks on -open sets in generalized topological spaces

The concepts of θ -open ( θ -closed) set and operation γ θ on generalized topological space were introduced by Császár (2002) [1]. In this paper, we introduce the concepts of θ ˜ -open set and operation γ θ ˜ in a generalized topological space. In particular, we investigate the characterizations for modified θ ˜ -closed sets in terms of operations ( γ | M ) θ and γ θ ˜ .