Abstract
Chin.J.Astron.Astrophys.3:113,2003 Exact solutions for a model with variable $G$, $\Lambda$ and bulk viscosity
are obtained. Inflationary solutions with constant (de Sitter-type) and
variable energy density are found. An expanding anisotropic universe is found
to isotropize during its course of expansion but a static universe is not. The
gravitational constant is found to increase with time and the cosmological
constant decreases with time as $\Lambda \propto t^{-2}$.