Abstract
We give some rigidity theorems for an n-dimensional (\(n\ge 4\)) compact Riemannian manifold with harmonic Weyl curvature, positive scalar curvature and positive constant \(\sigma _2\) curvature. Moreover, we prove that a 4-dimensional compact locally conformally flat Riemannian manifold with positive scalar curvature and positive constant \(\sigma _2\) curvature is isometric to a quotient of the round \(\mathbb {S}^4\).
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The authors are very grateful to Professor Haizhong Li for his guidance and constant support.
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Supported by National Natural Science Foundations of China #11761049, Jiangxi Province Natural Science Foundation of China #20171BAB201001.
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Fu, HP., He, HY. On Compact Riemannian Manifolds with Harmonic Weyl Curvature. Results Math 74, 77 (2019). https://doi.org/10.1007/s00025-019-0994-y
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DOI: https://doi.org/10.1007/s00025-019-0994-y