1st eigenvalue pinching for convex hypersurfaces in a Riemannian manifold
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- by Yingxiang Hu and Shicheng Xu PDF
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Abstract:
This is an application of our previous quantitative rigidity result via pinching Heintze–Reilly’s inequality. Based on work by Hu and Xu [Recognizing shape via 1st eigenvalue, mean curvature, and upper curvature bound, arXiv:1905.01664v2], we prove that for any closed convex hypersurface $M^n$ lying in a convex ball $B(p,R)$ of the ambient $(n+1)$-manifold $N^{n+1}$, whose sectional curvature $\mu \le K_N\le \delta$, if $\lambda _1(M)$ approaches $n(\delta +\|H\|_\infty ^2)$, then $M$ (resp., its enclosed domain) is Hausdorff (resp., $C^{1,\alpha }$) close to a sphere (resp., a geodesic ball) of constant curvature, where $\lambda _1(M)$ is the 1st eigenvalue of $M$ and $\|H\|_\infty$ is the maximum of $M$’s mean curvature in $N$.References
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Additional Information
- Yingxiang Hu
- Affiliation: Yau Mathematical Scieneces Center, Tsinghua University, Beijing, People’s Republic of China
- Email: huyingxiang@mail.tsinghua.edu.cn
- Shicheng Xu
- Affiliation: Mathematics Department, Capital Normal University, Beijing, People’s Republic of China; Academy for Multidisciplinary Studies, Capital Normal University, Beijing, People’s Republic of China
- MR Author ID: 923312
- ORCID: 0000-0001-5088-4818
- Email: shichengxu@gmail.com
- Received by editor(s): June 3, 2019
- Received by editor(s) in revised form: September 8, 2019, and October 1, 2019
- Published electronically: February 18, 2020
- Additional Notes: The first author was supported by China Postdoctoral Science Foundation (No.2018M641317)
The second author was partially supported by the National Natural Science Foundation of China [11871349], [11821101], and by research funds of the Beijing Municipal Education Commission and the Youth Innovative Research Team of Capital Normal University - Communicated by: Guofang Wei
- © Copyright 2020 American Mathematical Society
- Journal: Proc. Amer. Math. Soc. 148 (2020), 2609-2615
- MSC (2010): Primary 53C20, 53C21, 53C24
- DOI: https://doi.org/10.1090/proc/14916
- MathSciNet review: 4080901