Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2008-11-12
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
10 pages, latex. Contribution to the anniversary volume "Problems of Modern Cosmology" in honour of Prof. S.D. Odintsov to be
Scientific paper
By using the equivalence between metric and Palatini f(R) (or "modified")
gravities with omega=0, -3/2 Brans-Dicke theories, it is shown that the
Ehlers-Geren-Sachs theorem of general relativity is extended to modified
gravity. In the case of metric f(R) gravity previously studied, this agrees
with previous literature.
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