# General Relativity and Gravitation

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*n*-dimensional ($$n=4p, p$$ n=4p,p is a positive integer)

*f*(

*R*)-AdS black holes is divided into Schwazschild-AdS (SAdS) like ones and Reissner–Nordström-AdS (RN-AdS) like ones. Thermodynamical stability of them in grand canonical ensemble is investigated. Locally, we find that the RN-AdS like

*f*(

*R*) black holes will experience either type-one or type-two phase transitions from unstable...

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*f*(

*R*) cosmology, within the Palatini formalism, is discussed by only postulating the universe homogeneity and isotropy. To figure this out we build model-independent approximations of the luminosity distance through rational expansions. These approximants extend the Taylor convergence radii computed for usual cosmographic series. We thus consider both...

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General Relativity and Gravitation > 2019 > 51 > 1 > 1-25