Diameter growth and bounded topology of complete manifolds with nonnegative Ricci curvature

Diameter growth and bounded topology of complete manifolds with nonnegative Ricci curvature
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非负里奇曲率完全流形的直径增长和有界拓扑

DOI:
10.1007/s10455-016-9539-8
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发表时间:
2017-06
期刊:
Annals of Global analysis and Geometry
影响因子:
--
通讯作者:
Yi-Hu Yang
Yi-Hu Yang
中科院分区:
其他
文献类型:
--
作者:
Huihong Jiang;Yi-Hu Yang

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本文证明了具有非负Ricci曲率的完备维黎曼流形是有限拓扑型的,只要M的直径增长是级的,且截面曲率在足够大的测地球外不小于(这里是某个正的常数).特别地,如果在所讨论的流形的孤立端的邻域中,满足上述假设,则该端具有领邻域。
In this note, we show that a completen-dim Riemannian manifold with nonnegative Ricci curvature is of finite topological type provided that the diameter growth ofMis of orderand the sectional curvature is no less than(here,andcis some positive constant) outside a geodesic ball large enough. In particular, if in a neighborhood of an isolated end of the manifold in question, the above assumptions are satisfied, then the end has a collared neighborhood.
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