Sasikala DDeepa M2020-08-252020-08-252019-10-110886-936https://app.box.com/s/ca853bqzai108mh0ynqohun25k0dczerhttps://dspace.psgrkcw.com/handle/123456789/1105The main aim of this paper is to present a new set, namely quad j-open set in quad topological space. We discuss the basic properties of quad j-open sets using quad j-interior and quad j-closure. In Addition we study the relationships among quad j-closed, quad b-closed and quad j-regular open in quad topological space.enquad j-openquad j-closedquad pre closurequad regular openArticle