Abstract
We present a method which enables exact solutions to be found for flat homogeneous and isotropic scalar-tensor cosmologies with an arbitrary $\ensuremath{\omega}(\ensuremath{\Phi})$ function, and satisfying the general perfect fluid state equation $P=(\ensuremath{\gamma}\ensuremath{-}1)\ensuremath{\rho}{c}^{2}.$ This method has been used to analyze a wide range of asymptotic analytical solutions at early and late times for different epochs in cosmic history: false vacuum inflationary models, vacuum and radiation-dominated models, and matter-dominated models. We also describe the qualitative behavior of models at intermediary times and give exact solutions at any time for some particular scalar-tensor theories.
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