  We introduce a systematic low-energy approach to strongly correlated electron
systems in infinite dimensions, and apply it to the problem of the
correlation-induced metal-insulator transition in the half-filled Hubbard
model. We determine the low-energy scaling functions of the metallic state,
including the single-particle Green function and dynamical spin susceptibility,
as well as thermodynamic properties and relate them to experimental data in
transition metal oxides.
