2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53729After a short review of the algebraic setting of N=2 superconformal field theories, their chiral ring and their perturbations, I present some recent results on curious relations between the integrability of their perturbations and algebraic properties of their deformed chiral ring. (Lecture given at Hang-zhou, China, Sept 1993)(11 pages)High Energy Physics - Theorytext