Autonomous dynamical system approach for f(R) gravity
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DOI: 10.1103/physrevd.96.104049
Abstract: In this work we shall investigate the cosmological dynamical system of $f(R)$ gravity, by constructing it in such a way so that it is rendered autonomous. We shall study the vacuum $f(R)$ gravity case, but… read more here.
Keywords: autonomous dynamical; dynamical system; system; sitter ... See more keywords
Cosmological perfect-fluids in f(R) gravity
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DOI: 10.1142/s0219887819500087
Abstract: We show that an [Formula: see text]-dimensional generalized Robertson–Walker (GRW) space-time with divergence-free conformal curvature tensor exhibits a perfect fluid stress–energy tensor for any [Formula: see text] gravity model. Furthermore, we prove that a conformally… read more here.
Keywords: perfect fluids; fluids gravity; cosmological perfect; gravity ... See more keywords