Λrs - open sets and Λrs - closed sets in topological spaces

Abstract

In [16] Maki has introduced the concept of Λ-sets in topological spaces as the sets that coincide with their kernel. The kernel of a set A is the intersection of all open supersets of A. In this paper we obtain new classes of sets by using regular semi open sets in topological spaces and study their basic properties, and their connections with other kind of topological sets.