2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55155The aim of this talk is to give a brief introduction to the problem of confinement in QCD and to N=2 globally supersymmetric Yang-Mills gauge theories (SYM). While avoiding technicalities as much as possible I will try to emphasize the physical ideas which lie behind the picture of confinement as a consequence of the vacua of QCD to be a dual superconductor. Finally I review the implementation of this picture in the framework of N=2 SYM.18 pages, latex file. Some misprint corrected. One formula corrected and a note erased. Talk delivered at the XVIII Encontro Nacional de Fisica de Particulas e Campos, 29th September 1997, Caxambu,MG,BrasilHigh Energy Physics - Theorytext