Abstract
Dynamical system methods are used in the study of the stability of spatially flat homogeneous cosmologies within a large class of generalized modified gravity models in the presence of a relativistic matter-radiation fluid. The present approach can be considered as the generalization of previous works in which only F(R) cases were considered. Models described by an arbitrary function of all possible geometric invariants are investigated and general equations giving all critical points are derived.
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Cognola, G., Zerbini, S. Homogeneous Cosmologies in Generalized Modified Gravity. Int J Theor Phys 47, 3186–3200 (2008). https://doi.org/10.1007/s10773-008-9754-6
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DOI: https://doi.org/10.1007/s10773-008-9754-6