Exact cosmological solutions from conservation laws and induced gravity matched with observational data

We discuss, in the framework of induced gravity, singularity free cosmologies, deriving a class of exact solutions depending on the form of gravitational coupling and of interaction potential. The basic principle from which such cosmologies are derived, is the fact that, in a more general theory, cosmological singularities can be removed considering conservation laws always and absolutely valid. It is very important to stress that we find a fine agreement among the solutions and the data coming from all recent observational campaigns. (C) 2004 Elsevier B.V. All rights reserved.