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 …

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 study all four types of finite-time future singularities emerging in the late-time
accelerating (effective quintessence/phantom) era from ℱ (R, G)-gravity, where R and G are …

We review the recent progress for modified gravity models of dark energy–including f (R)
gravity, scalar-tensor theories, and braneworld models. In f (R) gravity, where the …

We propose, as a novelty in the literature, the modeling of wormholes within a particular
case of f (R, T) gravity, namely f (R, T)= R+ α R^ 2+ λ T f (R, T)= R+ α R 2+ λ T, with R and T …

We study the structure of neutron stars in the f (R)= R+ α R 2 theory of gravity (the
Starobinsky model) in an exact and nonperturbative approach. In this model, apart from the …

Constantly accumulating observational data continue to confirm that about 70% of the
energy density today consists of dark energy responsible for the accelerated expansion of …

We consider the covariant Galileon gravity taking into account the third order and fourth
order scalar field Lagrangians L 3 (π) and L 4 (π), consisting of three and four π's with four …