Let Mn(n ≥ 4) be an oriented closed submanifold with parallel mean curvature in an(n + p)-dimensional locally symmetric Riemannian manifold Nn+p. We prove that if the sectional curvature of N is positively pinche...Let Mn(n ≥ 4) be an oriented closed submanifold with parallel mean curvature in an(n + p)-dimensional locally symmetric Riemannian manifold Nn+p. We prove that if the sectional curvature of N is positively pinched in [δ, 1], and the Ricci curvature of M satisfies a pinching condition, then M is either a totally umbilical submanifold, or δ = 1, and N is of constant curvature. This result generalizes the geometric rigidity theorem due to Xu and Gu[15].更多还原展开更多
基金Supported by the National Natural Science Foundation of China (11531012, 11371315, 11301476), the Trans- Century Training Programme Foundation for Talents by the Ministry of Education of China, and the Postdoctoral Science Foundation of Zhejiang Province (Bsh1202060).
文摘Let Mn(n ≥ 4) be an oriented closed submanifold with parallel mean curvature in an(n + p)-dimensional locally symmetric Riemannian manifold Nn+p. We prove that if the sectional curvature of N is positively pinched in [δ, 1], and the Ricci curvature of M satisfies a pinching condition, then M is either a totally umbilical submanifold, or δ = 1, and N is of constant curvature. This result generalizes the geometric rigidity theorem due to Xu and Gu[15].更多还原