Abstract
In this paper, we study the evolving behaviors of the first eigenvalue of the Laplace–Beltrami operator under the normalized backward Ricci flow, construct various quantities which are monotonic under the backward Ricci flow and get upper and lower bounds. We prove that in cases where the backward Ricci flow converges to a sub-Riemannian geometry after a proper rescaling, the eigenvalue evolves toward zero.
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Acknowledgements
The author would like to thank Professor Xiaodong Cao and Professor Laurent Saloff-Coste for their suggestions and interests in this work. The author would also like to thank referees for their valuable comments.
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Supported by NSFC (Grant No. 11001268) and Chinese Universities Scientific Fund (Grant No. 2014QJ002)
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Hou, S.B. Eigenvalues under the Backward Ricci Flow on Locally Homogeneous Closed 3-manifolds. Acta. Math. Sin.-English Ser. 34, 1179–1194 (2018). https://doi.org/10.1007/s10114-018-6448-8
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DOI: https://doi.org/10.1007/s10114-018-6448-8