Comment on ``Nontrivial Geometries: Bounds on the Curvature of the Universe''
arXiv:0705.2992 · doi:10.1016/j.astropartphys.2008.09.001
Abstract
The paper 0705.0332v1 seeks to study the effect of non-trivial spatial curvature in homogeneous and isotropic models. We note that the space considered is not homogeneous, and that the equations of motion used are inconsistent with the metric. Also, we explain why the spatial curvature of homogeneous and isotropic spacetimes always evolves like 1/a^2, contrary to the central assumption of 0705.0332v1.
arXiv comment4 pages
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- Applicability of the linearly perturbed FRW metric and Newtonian cosmology
- Towards statistically homogeneous and isotropic perfect fluid universes with cosmic backreaction
- Violation of the FRW consistency condition as a signature of backreaction
- Analytical solutions for two inhomogeneous cosmological models with energy flow and dynamical curvature
- Bayesian analysis of the backreaction models
- Towards physical cosmology: geometrical interpretation of Dark Energy, Dark Matter and Inflation without fundamental sources