On Quasi Semipre-θ-Closed Sets in Topology

Abstract

N. Levine [8] introduced and investigated the notion of generalized closed set. It is the object of this paper to offer a new notion of generalized closed set called quasi semipre-θ-closed set. This class is obtained by generalizing semipre-θ-closed sets. We also study and characterize the class of βθ-T_½ spaces.

Key words and phrases. β-open sets, quasi βθ- closed sets, βθ -sets, weakly β-irresolute functions, semipre-θ-closure.

1991 Mathematics Subject Classification. 54C10, 54D10