GAUGED NJL-MODEL AT STRONG CURVATURE

We investigate the gauged NJL-model in curved space-time using the RG formulation and the equivalency with the gauge Higgs-Yukawa model in a modified 1/N-c expansion. The strong curvature induced chiral symmetr y breaking is found in the non-perturbative RG approach (presumably eq uivalent to the ladder Schwinger-Dyson equations). The dynamically gen erated fermion mass is explicitly calculated and inducing of Einstein gravity is briefly discussed, This approach shows the way to the non-p erturbative study of the dynamical symmetry breaking at external field s.