Remarks on θθ-open sets in generalized topological spaces

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