Characterizations of Hayashi-Samuel Spaces via Boundary Points

Abstract

Some new closure operators in topological spaces with ideals are a part of this paper. A comparative study of a new type of boundary point, which is defined with the help of the local function and the boundary points will be discussed through this paper. Characterizations of Hayashi-Samuel spaces are also an object of this paper.

Keywords

• ideal topological space
• hayashi-samuel
• local function
• \psi-operator