ريهام محمد يحي الاحمدي2022-05-192022-05-191139https://drepo.sdl.edu.sa/handle/20.500.14154/10477The concept of a manifold is central to many parts of differential geometry and modern mathematical physics, because it allows more complicated structures to be described and understood in terms of the relatively well-understood properties of euclidean space. The deformation on product Riemannian manifold are introduced. Finally some new results and theorems are obtained.ar-SAThesis