2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55982Review of the theory of effective actions and the hypothetical origins of integrability in Seiberg-Witten theory.13 pages, LaTeX; Talk given at the Workshop "Integrability: the Seiberg-Witten and Whitham equations", Edinburgh, September 1998High Energy Physics - Theorytext