http://arxiv.org/abs/1812.00938
We study a class of almost scale-invariant modified gravity theories, using a particular form of $f(R, G) = \alpha R^2 + \beta G \log G$ where $R$ and $G$ are the Ricci and Gauss-Bonnet scalars, respectively and $\alpha$, $\beta$ are arbitrary constants. We derive the Einstein-like field equations to first order in cosmological perturbation theory in longitudinal gauge.
J. Fuentes, U. Gillani and K. Malik
Tue, 4 Dec 18
69/78
Comments: 13 pages. Companion Mathematica notebooks can be found in this https URL
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