N=2 MODULI SPACES AND N=1 DUALITIES FOR SO(N(C)) AND USP(2N(C)) SUPER-QCD

We determine the exact global structure of the moduli space of N = 2 s upersymmetric SO(n) and USp(2n) gauge theories with matter hypermultip lets in the fundamental representations, using the non-renormalization theorem for the Higgs branches and the exact solutions for the Coulom b branches. By adding an (N = 2)-breaking mass term for the adjoint ch iral field and varying the mass, the N = 2 theories can be made to flo w to either an ''electric'' N = 1 supersymmetric QCD or its N = 1 dual ''magnetic'' version. We thus obtain a derivation of the N = 1 dualit ies of Seiberg.