ON SUBSETS OF
In this article, we study some geometrical properties of subsets in as a differentiable manifold with focal points. We also define some concepts in comparison with its similar ones in both Euclidean space and a Riemannian manifold without focal points such as supporting element, convex hull, exposed points and extreme points.
sphere convex sets, strictly convex sets, supporting element, convex hull, exposed points, extreme points.