On Surfaces Properties of Doubly Warped product Manifolds hI×fB in generalized Robertson-Walker spacetimes

Abstract

Abstract This paper concerns the properties of submanifolds of doubly warped product space. For Riemannian manifold B and interval I, we investigate some surfaces properties of doubly warped product manifolds hI×fB, and obtain the scalar curvature for the doubly warped product space.