  We present a new method, based on the combination of analytical and numerical
techniques within the framework of the dynamical mean-field theory (DMFT).
Building upon numerically exact results obtained in an improved quantum Monte
Carlo (QMC) scheme, 10th order strong-coupling perturbation theory for the
Hubbard model on the Bethe lattice is extrapolated to infinite order. We obtain
continuous estimates of energy E and double occupancy D with unprecedented
precision O(10^{-5}) for the Mott insulator above its stability edge
U_{c1}=4.78 as well as critical exponents. The relevance for recent experiments
on Cr-doped V_2O_3 is pointed out.
