d*g? –Homeomorphism and d*g?c–Homeomorphism in Topological Spaces

Abstract
In this paper, the concepts of d*g? - homeomorphism and d*g?c - homeomorphism are introduced and the relationships between the newly defined homeomorphisms and the existing homeomorphisms are established and some of their properties are derived. It is show that the composition of two d*g?-homeomorphisms need not be d*g? - homeomorphism.