r-set and r*-set via -open set
The notion of d-open sets in a topological space was studied by Velicko. Following this Ekici et. al. studied the notions of a-open and e*-open sets by mixing the operators closure, interior, d-interior and d-closure. In this paper some new sets are defined and studied by using the above operators. Moreover some of the existing concepts in topological spaces have been characterized using the newly defined sets.