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) …

Modified gravity theories have received increased attention lately due to combined
motivation coming from high-energy physics, cosmology, and astrophysics. Among …

The recent observation of the shadow of the supermassive black hole M87*, located at the
center of the M87 galaxy, by the Event Horizon Telescope Collaboration has opened up a …

We review in detail a number of approaches that have been adopted to try and explain the
remarkable observation of our accelerating universe. In particular we discuss the arguments …

This biennial Review summarizes much of particle physics. Using data from previous
editions, plus 2158 new measurements from 551 papers, we list, evaluate, and average …

We review the paradigm of quintom cosmology. This scenario is motivated by the
observational indications that the equation-of-state of dark energy across the cosmological …

The theory of inflation with single and multiple fields is reviewed paying particular attention
to the dynamics of adiabatic and entropy/isocurvature perturbations which provide the …

We review the general features of nonsingular universes (ie those that go from an era of
accelerated collapse to an expanding era without displaying a singularity) as well as cyclic …

We review the study of inhomogeneous perturbations about a homogeneous and isotropic
background cosmology. We adopt a coordinate based approach, but give geometrical …

To find more deliberate f (R, T) cosmological solutions, we take our previous paper further by
studying some new aspects of the considered models via investigation of some new …