Homogeneous and isotropic cosmologies of the Planck era before the classical Einstein
equations become valid are studied taking quantum gravitational effects into account. The …

Cosmologies with a time dependent Newton constant and cosmological constant are
investigated. The scale dependence of G and Λ is governed by a set of renormalization …

We consider Einstein's equations with variable gravitational coupling G and cosmological
term Λ. For a power-law time-dependence of G, the cosmological term varies in proportion to …

We examine cosmological models with generalized phantom energy (GPE). Generalized
phantom energy satisfies the supernegative equation of state, but its evolution with the scale …

Einstein's equations with variable G and A scalars are considered for a Bianchi type I metric.
A solution is found in which the cosmological term varies inversely with the square of time …

We have considered a cosmological model with a phenomenological model for the
cosmological constant of the form Λ= β R̈/R where β is a constant. For an age parameter …

Cosmology with the gravitational and cosmological constants generalized as coupling
scalars in Einstein's theory is considered. A general method of solving the field equations is …

A linear cosmological perturbation theory of an almost homogeneous and isotropic perfect
fluid Universe with dynamically evolving Newton constant G and cosmological constant Λ is …

Bianchi type I cosmological models with variable <Emphasis Type="Italic">G </Emphasis> and
&#x039B;: A Page 1 General Relativity and Granitation, Vol. s No. 6, 1995 Bianchi Type I …

We have studied the time dependence of the gravitational constant GG and cosmological
constant Λ \varLambda by taking into account an anisotropic and homogeneous Bianchi …