考虑球面中具有平行单位平均曲率向量的完备子流形Mn,利用广义极大值原理证明了若Mn的第二基本形模长平方S满足适当的上界条件,则Mn是全脐子流形.
Complete submanifolds with parallel normalized mean curvature vector in spheres are studied.By using the generalized maximal principle,the sufficient condition for submanifolds being a totally umbilical ones is obtained.