Characterizations of g*-open functions in topology

The purpose of this paper is to define and study the new classes of functions, called G*-open functions, pre-G*-open functions, G*-closed functions, always G*-open functions and always G*-closed functions via newly introduced G*-closed sets due to Navalagi (August – 2018 ). Also, some normality axioms are introduced and their preservations are studied.