Abstract
We show that within the class of gravity theories, Friedmann-Lemaître-Robertson-Walker power-law perfect fluid solutions only exist for gravity. This significantly restricts the set of exact cosmological solutions which have similar properties to what is found in standard general relativity.
- Received 21 June 2009
DOI:https://doi.org/10.1103/PhysRevD.80.061301
©2009 American Physical Society