Bochner operator;
Betti numbers;
Homology groups;
Pinching;
Mean curvature;
Length of the second fundamental form;
PARALLEL MEAN-CURVATURE;
MINIMAL SUBMANIFOLDS;
RICCI CURVATURE;
SPHERE THEOREM;
RIGIDITY THEOREMS;
SPACE-FORMS;
HYPERSURFACES;
IMMERSIONS;
D O I:
10.1007/s12220-022-01032-9
中图分类号:
O1 [数学];
学科分类号:
0701 ;
070101 ;
摘要:
We investigate the geometry and topology of submanifolds under a sharp pinching condition involving extrinsic invariants like the mean curvature and the length of the second fundamental form. Homology vanishing results are given that strengthen and sharpen previous ones. In addition, an integral bound is provided for the Bochner operator of compact Euclidean submanifolds in terms of the Betti numbers.
机构:
Univ Joseph Fourier Grenoble I, Inst Fourier, CNRS, UMR 5582,UJF, F-38402 St Martin Dheres, FranceUniv Joseph Fourier Grenoble I, Inst Fourier, CNRS, UMR 5582,UJF, F-38402 St Martin Dheres, France
Pipoli, G.
Sinestrari, C.
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机构:
Univ Roma Tor Vergata, Dipartimento Matemat, Via Ric Sci, I-00133 Rome, ItalyUniv Joseph Fourier Grenoble I, Inst Fourier, CNRS, UMR 5582,UJF, F-38402 St Martin Dheres, France
机构:
Zhejiang Univ, Ctr Math Sci, Hangzhou 310027, Zhejiang, Peoples R ChinaZhejiang Univ, Ctr Math Sci, Hangzhou 310027, Zhejiang, Peoples R China
Xu, Hong-Wei
Lei, Li
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机构:
Zhejiang Univ, Ctr Math Sci, Hangzhou 310027, Zhejiang, Peoples R ChinaZhejiang Univ, Ctr Math Sci, Hangzhou 310027, Zhejiang, Peoples R China
Lei, Li
Gu, Juan-Ru
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机构:
Zhejiang Univ, Ctr Math Sci, Hangzhou 310027, Zhejiang, Peoples R China
Zhejiang Univ Technol, Dept Appl Math, Hangzhou 310023, Zhejiang, Peoples R ChinaZhejiang Univ, Ctr Math Sci, Hangzhou 310027, Zhejiang, Peoples R China
机构:
Department of Aerospace Engineering, Indian Institute of Technology, Chennai - 600036, Madras
D.K. Zabolotny Institute of Microbiology and Virology, NAS of Ukraine, 252147 KievDepartment of Aerospace Engineering, Indian Institute of Technology, Chennai - 600036, Madras