2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53902We propose a definition of a Poincaré algebra for a two dimensional space--time with one discretized dimension. This algebra has the structure of a Hopf algebra. We use the link between Onsager's uniformization of the Ising model and the dispersion relation of a free particle in this space--time, together with the rapidity representation of the quantum deformation of the Poincaré enveloping algebra.plain.tex, 10 pages, shortened harvmac macros includedHigh Energy Physics - Theorytext