  We emphasize, on the basis of experimental data and theoretical calculations,
that the entropic stabilization of the gamma-phase is the main driving force of
the alpha-gamma transition of cerium in a wide temperature range below the
critical point. Using a formulation of the total energy as a functional of the
local density and of the f-orbital local Green's functions, we perform
dynamical mean-field theory calculations within a new implementation based on
the multiple LMTO method, which allows to include semi-core states. Our results
are consistent with the experimental energy differences and with the
qualitative picture of an entropy-driven transition, while also confirming the
appearance of a stabilization energy of the alpha phase as the quasiparticle
Kondo resonance develops.
