Weyl Tensor
The Tensor
where
is the Riemann Tensor and 
is the Curvature Scalar. The Weyl tensor is defined so thatevery Contraction between indices gives 0. In particular,
. The number of independent components for a Weyl tensor in 
-D is given by
See also Curvature Scalar, Riemann Tensor
References
Weinberg, S. Gravitation and Cosmology: Principles and Applications of the General Theory of Relativity. New York: Wiley, p. 146, 1972.
- Mystic Pentagram
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