Cosmological models with bulk viscosity in the presence of adiabatic matter creation and with variable G, c, and Lambda

Some properties of cosmological models with a time variable bulk viscous co efficient in the presence of adiabatic matter creation and variable G, c, L ambda are investigated in the framework of a specifically flat FRW line ele ment. We trivially find a set of solutions through Dimensional Analysis. In all the studied cases it is found that the behaviour of these "constants" is inversely proportional to the cosmic time. It is found that with the sol ution obtained our model verifies the principles of general covariance and Lorentz invariance. Finally we emphasize that the envisaged models are free of the horizon and entropy problem.