249 citations · 1.2k across the 20 of their papers we have counts for
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Viable f(R) gravity and future cosmological evolution
Diego Sáez-Gómez
One of the so-called viable modified gravities is analyzed. This kind of gravity theories are characterized by a well behavior at local scales, where General Relativity is recovere…
Cosmological evolution, future singularities, Little Rip and Pseudo-Rip in viable f(R) theories and their scalar-tensor counterpart
Diego Sáez-Gómez
Modified f(R) gravity is one of the most promising candidates for dark energy, and even for the unification of the whole cosmological evolution, including the inflationary phase. W…
Conformal frames and the validity of Birkhoff's theorem
Salvatore Capozziello, Diego Sáez-Gómez
Birkhoff's theorem is one of the most important statements of Einstein's general relativity, which generally can not be extended to modified theories of gravity. Here we study the…
Ekpyrotic universes in Hořava-Lifshitz gravity
A. J. López-Revelles, Ratbay Myrzakulov, Diego Sáez-Gómez
The Ekpyrotic scenario is studied in the context of some extensions of Hořava-Lifshitz gravity. Some particular solutions that lead to cyclic Hubble parameters are analyzed, where…