The dynamics of cosmological expansion is studied for a spatially flat matter-dominated
universe filled with barotropic casual bulk viscous fluid. The evolution equation for the …

We study the evolution of cosmological density perturbations of cold dark matter (CDM) in an
expanding matter-dominated universe with respect to a homogeneous spatially flat …

The inflationary model based on a single scalar field with a quadratic potential V (ϕ)∼ ϕ 2 is
disfavored by the recent Planck constraints on the values of scalar spectral index, and the …

We study the density contrast equations for cold dark matter (CDM) in the cosmological
radiation and dark energy (DE) background. We provide a general prescription for the …

Cosmological density perturbations governed by Newtonian and MONDian force laws
scenarios for the period from matter domination to recombination have been investigated …