Ionic radius: Difference between revisions
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A '''curvature collineation''' (often abbreviated to '''CC''') is [[vector field]] which preserves the [[Riemann tensor]] in the sense that, | |||
:<math>\mathcal{L}_X R^a{}_{bcd}=0</math> | |||
where <math>R^a{}_{bcd}</math> are the components of the Riemann tensor. The [[Set (mathematics)|set]] of all [[smooth function|smooth]] curvature collineations forms a [[Lie algebra]] under the [[Lie bracket]] operation (if the smoothness condition is dropped, the set of all curvature collineations need not form a Lie algebra). The Lie algebra is denoted by <math>CC(M)</math> and may be [[infinity|infinite]]-[[dimension]]al. Every [[affine vector field]] is a curvature collineation. | |||
==See also== | |||
* [[Conformal vector field]] | |||
* [[Homothetic vector field]] | |||
* [[Killing vector field]] | |||
* [[Matter collineation]] | |||
* [[Spacetime symmetries]] | |||
{{relativity-stub}} | |||
[[Category:Mathematical methods in general relativity]] |
Revision as of 18:59, 13 January 2014
A curvature collineation (often abbreviated to CC) is vector field which preserves the Riemann tensor in the sense that,
where are the components of the Riemann tensor. The set of all smooth curvature collineations forms a Lie algebra under the Lie bracket operation (if the smoothness condition is dropped, the set of all curvature collineations need not form a Lie algebra). The Lie algebra is denoted by and may be infinite-dimensional. Every affine vector field is a curvature collineation.
See also
- Conformal vector field
- Homothetic vector field
- Killing vector field
- Matter collineation
- Spacetime symmetries
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