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https://doi.org/10.1016/j.geomphys.2018.12.009
Copy DOIJournal: Journal of Geometry and Physics | Publication Date: Dec 24, 2018 |
Citations: 11 | License type: publisher-specific-oa |
We study symmetric Killing 2-tensors on Riemannian manifolds. We show that several additional conditions can be realized only for Sasakian manifolds and Euclidean spheres. In particular we recover a result of S. Gallot on the characterization of spheres by means of functions satisfying a certain differential equation of order three.
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