# A simple characterization of generalized Robertson–Walker spacetimes

@article{Chen2014ASC, title={A simple characterization of generalized Robertson–Walker spacetimes}, author={Bang-Yen Chen}, journal={General Relativity and Gravitation}, year={2014}, volume={46}, pages={1-5} }

A generalized Robertson–Walker spacetime is the warped product with base an open interval of the real line endowed with the opposite of its metric and base any Riemannian manifold. The family of generalized Robertson–Walker spacetimes widely extends the one of classical Robertson–Walker spacetimes. Further, generalized Robertson–Walker spacetimes appear as a privileged class of inhomogeneous spacetimes admitting an isotropic radiation.In this section we prove a very simple characterization of… Expand

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