(i, j)-Irg* Closed Sets in Ideal Bitopological Spaces

The aim of this paper is to introduce the concepts of (i, j)-regular generalized star closed sets , (i, j)-regular generalized star open sets and study their basic properties in ideal bitopological spaces. In particular, it is proved that (i, j)-Irg* closed sets are closed under finite unions. Also some relations are given and we establish that some relations are not reversible, which are justified with suitable examples. Further the necessary and sufficient condition for a subset A of an ideal bitopological space (X, tau_1, tau_2, I) to be an (i, j)-Irg* open set is established.