  We show that the analytic single-particle density of states and the optical
conductivity for the half-filled Hubbard model on the Bethe lattice in infinite
dimensions describe quantitatively the behavior of the gap and the kinetic
energy ratio of the correlated insulator $V_2O_3$. The form of the optical
conductivity shows $\omega^{3/2}$ rising and is quite similar to the
experimental data, and the density of states shows $\omega^{1/2}$ behavior near
the band edges.
