Summary of the Papers in this Volume

My research work has been in the following topics of Differential Geometry: (A) Relations between topology and curvature of Riemannian manifolds. (B) Convexity and rigidity of isometric immersions. (C) Minimal Submanifolds, in particular, minimal surfaces. (D) Conformal immersions. (E) Hypersurfaces of constant mean curvature and constant r-mean curvatures. (F) Hopf-type theorems. (G) None of the above, but in this volume.