Let be the volume of a Ball of radius in a complete -D Riemannian Manifold with RicciCurvature . Then , where is the volume of a Ball in a spacehaving constant Sectional Curvature. In addition, if equality holds for some Ball, then this Ballis Isometric to the Ball of radius in the space of constant Sectional Curvature.
References
Chavel, I. Riemannian Geometry: A Modern Introduction. New York: Cambridge University Press, 1994.