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A. G. D. Watson's principal directions for a Riemannian V4
Published online by Cambridge University Press: 20 January 2009
Extract
A. G. D. Watson (1939-41), remarking that there are no Ricci principal directions ata world-point of space-time at which the Einstein equations are satisfied, shows how to define at any world-point a set of principal directions intrinsically related to the Riemann tensor Rijkl itself. These directions are unique except when the space-time has any kind of rotational symmetry about the world-point.
- Type
- Research Article
- Information
- Proceedings of the Edinburgh Mathematical Society , Volume 7 , Issue 3 , February 1946 , pp. 144 - 152
- Copyright
- Copyright © Edinburgh Mathematical Society 1946
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