Convexidade de hipersuperfícies de Rn+1 com curvaturas seccionais não-negativas

Abstract

The objective this dissertation and study immersions of manifolds with negative sectional curvature Non- . More precisely , we will detail hum article M. Carmo and E. Lima , that of a new hum Statement theorem DUE one Sacksteder . Using Arguments Differential Topology, The Two Authors proved , among other things, a que complete hypersurface Mn Rn + 1 WITH sectional curvatures negative Non- And if convex at Least One such sectional curvature to positive.