伪黎曼空间形式中完备类空子流形的余维数约化
Reduction of Codimension of Complete Spacelike Submanifolds in Semi-Rimannian Space Forms
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摘要: 设Mn为等距浸入到伪黎曼空间形式Npn+p (c) 中的完备类空子流形, 平均曲率H有界且具有平行单位平均曲率向量场.如果Mn的平均曲率H满足相应条件, 证明了该子流形的余维数p-可约化的问题.Abstract: Let Mn with parallel normalized mean curvature vector field be a complete spacelike submanifold isometric immersed into a semi-Riemannian space form Npn+p (c) , whose mean curvature His bounded.We prove that if the mean curvature H of Mn satisfies the corresponding conditions, then the codimension of Mn will be reduced.
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