THE MODULI SPACE OF VACUA OF N=2 SUSY QCD AND DUALITY IN N=1 SUSY QCD

We analyze in detail the moduli space of vacua of N = 2 SUSY QCD with n(c) colors and n(f) flavors, The Coulomb branch has submanifolds with non-Abelian gauge symmetry, The massless quarks and gluons at these v acua are smoothly connected to the underlying elementary quarks and gl uons, Upon breaking N = 2 by an N = 1 preserving mass term for the adj oint field the theory flows to N = 1 SUSY QCD, Some of the massless qu arks and gluons on the moduli space of the N = 2 theory become the mag netic quarks and gluons of the N = 1 theory, In this way we derive the duality in N = 1 SUSY QCD by identifying its crucial building blocks - the magnetic degrees of freedom - using only semiclassical physics a nd the non-renormalization theorem.