Pf. Leung, AN ESTIMATE ON THE RICCI CURVATURE OF A SUBMANIFOLD AND SOME APPLICATIONS, Proceedings of the American Mathematical Society, 114(4), 1992, pp. 1051-1061
We prove a best possible lower bound on the Ricci curvature of an imme
rsed submanifold in a Euclidean space and apply it to study the size o
f the Gauss image of a complete noncompact hypersurface with constant
positive mean curvature in a Euclidean space.