Contra b-continuous function between topological spaces

الملخص EN

In this paper we apply the notion of b- open set [4] to introduce and investigate a new class of functions called contra b-continuous functions as new generalizations of contra continuous functions, this form of functions is stronger than contra p-continuous functions [2] and weaker than both contra semi-continuous functions [6] and contra pre-continuous functions [9].

Also we use the notion of b*-open sets [3] to introduce the class of b*-continuous functions which is stronger than contra b-continuous functions and weaker than contra s-continuous functions.

Several characterizations and properties are obtained.In this paper we apply the notion of b- open set [4] to introduce and investigate a new class of functions called contra b-continuous functions as new generalizations of contra continuous functions, this form of functions is stronger than contra p-continuous functions [2] and weaker than both contra semi-continuous functions [6] and contra pre-continuous functions [9].

Also we use the notion of b*-open sets [3] to introduce the class of b*-continuous functions which is stronger than contra b-continuous functions and weaker than contra s-continuous functions.

Several characterizations and properties are obtained.