Local estimate of fundamental groups
Local estimate of fundamental groups
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基本群的局部估计
DOI:
10.1016/j.aim.2019.06.006
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发表时间:
2019-05
期刊:
影响因子:
--
通讯作者:
Guoyi Xu
中科院分区:
文献类型:
--
作者:
Guoyi Xu
For any complete n-dim Riemannian manifold M n with nonnegative Ricci curvature, Kapovitch and Wilking proved that any finitely generated subgroup of the fundamental group π 1 (M n) can be generated by C (n) generators. Inspired by their work, we give a quantitative proof of the above theorem and show that C (n)≤ n n 20 n. Our main tools are quantitative Cheeger-Colding's almost splitting theory, and the squeeze lemma for covering groups between two Riemannian manifolds with nonnegative Ricci curvature.
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DOI:
10.1007/978-0-8176-4583-0
发表时间:
1999
期刊:
ArXiv
影响因子:
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影响因子:
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