Quantitative volume space form rigidity under lower Ricci curvature bound I

Quantitative volume space form rigidity under lower Ricci curvature bound I
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里奇曲率下界 I 下的定量体积空间形式刚度

DOI:
10.4310/jdg/1571882427
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发表时间:
2016-04
期刊:
J. Diff. Geom.
影响因子:
--
通讯作者:
Shicheng Xu
Shicheng Xu
中科院分区:
其他
文献类型:
--
作者:
Lina Chen;Xiaochun Rong;Shicheng Xu

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设\(M\)是一个紧致的\(n\)维流形,其里奇曲率\(\text{Ric}_M\geq(n - 1)H\)(\(H\)为常数)。我们关注以下空间形式刚性问题:在以下任一条件下,\(M\)与常曲率\(H\)的空间形式等距:(i) (这里原文“Th”似乎不完整,可能是有遗漏内容 )
Let $M$ be a compact $n$-manifold of $\operatorname{Ric}_M\ge (n-1)H$ ($H$ is a constant). We are concerned with the following space form rigidity: $M$ is isometric to a space form of constant curvature $H$ under either of the following conditions: (i) There is $\rho>0$ such that for any $x\in M$, the open $\rho$-ball at $x^*$ in the (local) Riemannian universal covering space, $(U^*_\rho,x^*)\to (B_\rho(x),x)$, has the maximal volume i.e., the volume of a $\rho$-ball in the simply connected $n$-space form of curvature $H$. (ii) For $H=-1$, the volume entropy of $M$ is maximal i.e. $n-1$ ([LW1]). The main results of this paper are quantitative space form rigidity i.e., statements that $M$ is diffeomorphic and close in the Gromov-Hausdorff topology to a space form of constant curvature $H$, if $M$ almost satisfies, under some additional condition, the above maximal volume condition. For $H=1$, the quantitative spherical space form rigidity improves and generalizes the diffeomorphic sphere theorem in [CC2].
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