2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/51179The theory of symmetry breaking in presence of gauge fields is presented, following the historical track. Particular emphasis is placed upon the underlying concepts.LaTeX file, 25 pages 9 figures. Presented at the 2001 Corfu Summer Institute on Elementary Particle PhysicsHigh Energy Physics - Theorytext