Abstract
We consider the Sampson Laplacian acting on covariant symmetric tensors on a Riemannian manifold. This operator is an example of the Lichnerowicz-type Laplacian. It is of fundamental importance in mathematical physics and appears in many problems in Riemannian geometry including the theories of infinitesimal Einstein deformations, the stability of Einstein manifolds and the Ricci flow. We study the Sampson Laplacian using the analytical method, due to Bochner, of proving vanishing theorems for the null space of a Laplace operator admitting Weitzenböck decomposition and further of estimating its lowest eigenvalue. In addition, we also survey a series of results that we obtained earlier.
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Acknowledgements
The work of the first author was supported by the Internal Grant Agency of the Faculty of Science of Palacky University, Olomouc (grant No. 2020014 “Mathematical Structures”). The authors would like to express their thanks to Professor Ivor Hall (BA Hons) for her editorial suggestions that contributed to the improvement in this paper as well as to the referee for his careful reading of the previous version of the manuscript and suggestions about this paper which led to various improvements.
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Dedicated to the memory of the professor Thomas Friedrich.
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Mikeš, J., Rovenski, V. & Stepanov, S.E. An example of Lichnerowicz-type Laplacian. Ann Glob Anal Geom 58, 19–34 (2020). https://doi.org/10.1007/s10455-020-09714-9
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DOI: https://doi.org/10.1007/s10455-020-09714-9