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 …

After a decade and a half of research motivated by the accelerating universe, theory and
experiment have reached a certain level of maturity. The development of theoretical models …

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

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 …

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 …

We review various modified gravities considered as gravitational alternative for dark energy.
Specifically, we consider the versions of f (R), f (G) or f (R, G) gravity, model with non-linear …

The properties of future singularities are investigated in the universe dominated by dark
energy including the phantom-type fluid. We classify the finite-time singularities into four …

We consider late-time cosmology in a (phantom) scalar-tensor theory with an exponential
potential, as a dark-energy model with equation of state parameter close to− 1 (a bit above …

The unifying approach to early-time and late-time universe based on phantom cosmology is
proposed. We consider gravity-scalar system which contains usual potential and scalar …