Viscous big bang cosmology with variable G and $\Lambda$
  We have examined the cosmological solutions with variable G and $\lambda$ and bulk viscosity. It is found that these solutions are free from the cosmological problems of the Standard Model. The proposed cosmology consists of two arbitrary parameters which are well constrained. The inflationary solution does not require $\Omega=1$ and arises with or without the cosmological constant. 
Arbab I.Arbab