The classical generalization of general relativity is considered as the gravitational alternative
for a unified description of the early-time inflation with late-time cosmic acceleration. The …

Over the past decade, f (R) theories have been extensively studied as one of the simplest
modifications to General Relativity. In this article we review various applications of f (R) …

We review the recent literature on modified theories of gravity in the Palatini approach. After
discussing the motivations that lead to consider alternatives to Einstein's theory and to treat …

We present new determinations of the cosmic expansion history from red-envelope galaxies.
We have obtained for this purpose high-quality spectra with the Keck-LRIS spectrograph of …

We use the recently released cosmic chronometer data and the latest measured value of the
local Hubble parameter, combined with the latest joint light curves of Supernovae Type Ia …

We present an update of our previous work, necessitated by availability of a significantly
improved dataset. The work is a model-independent analysis of the cosmological supernova …

A generalized parametrization w β (z) for the dark energy equation of state is proposed and
some of its cosmological consequences are investigated. We show that in the limit of the …

This paper is a review on the observational Hubble parameter data that have gained
increasing attention in recent years for their illuminating power on the dark side of the …

In this paper, we have discussed the cosmological consequence of the f (R) dark energy
scenario with the Kantowski-Sachs space-time in the context of strange quark matter with …

We study the Hamiltonian formulation of f (R) theories of gravity both in metric and in Palatini
formalism using their classical equivalence with Brans-Dicke theories with a nontrivial …