2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53247I describe how integrable quantum field theories in 2 spacetime dimensions are characterized by infinite dimensional quantum group symmetries, namely the q-deformations of affine Lie algebras, and their Yangian limit. These symmetries can provide a new non-perturbative formulation of the theories.15 pages. (Invited talk at the XXth International Conference on Differential Geometric Methods in Theoretical Physics, New York City, June 1991.)High Energy Physics - Theorytext