Singularities in any physical theory are either remarkable indicators of the unknown
underlying fundamental theory, or indicate a change in the description of the physical reality …

We systematically review some standard issues and also the latest developments of
modified gravity in cosmology, emphasizing on inflation, bouncing cosmology and late-time …

We review recent developments and results in testing general relativity (GR) at cosmological
scales. The subject has witnessed rapid growth during the last two decades with the aim of …

We review different dark energy cosmologies. In particular, we present the Λ CDM
cosmology, Little Rip and Pseudo-Rip universes, the phantom and quintessence …

In this review we present a thoroughly comprehensive survey of recent work on modified
theories of gravity and their cosmological consequences. Amongst other things, we cover …

We consider f (R, T) modified theories of gravity, where the gravitational Lagrangian is given
by an arbitrary function of the Ricci scalar R and of the trace of the stress-energy tensor T …

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 use Dirac's method for the quantization of constrained systems in order to quantize a
spatially flat Friedmann–Lemaître–Robertson–Walker spacetime in the context of f (Q) …

In the present paper, we use the holographic approach to describe the early-time
acceleration and the late-time acceleration eras of our Universe in a unified manner. Such …