Riemann compatible tensors

Details Riemann compatible tensors Riemann compatible tensors

2012-04-05

arxiv.org/abs/1204.1211v1

Mathematics

Differential Geometry

12 pages

Scientific paper

Derdzinski and Shen's theorem on the restrictions posed by a Codazzi tensor on the Riemann tensor holds more generally when a Riemann-compatible tensor exists. Several properties are shown to remain valid in this broader setting. Riemann compatibility is equivalent to the Bianchi identity of the new "Codazzi deviation tensor" with a geometric significance. Examples are given of manifolds with Riemann-compatible tensors, in particular those generated by geodesic mapping. Compatibility is extended to generalized curvature tensors with an application to Weyl's tensor and general relativity.

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