  We study the liquid-glass transition of the Lennard-Jones binary mixture
introduced by Kob and Andersen from a thermodynamic point of view. By means of
the replica approach, translating the problem in the study of a molecular
liquid, we study the phase transition due to the entropy crisis and we find
that the Kauzmann's temperature $\tk$ is $\sim 0.32$. At the end we compare
analytical predictions with numerical results.
