2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/51565We discuss the nonlinear transformations of standard Poincaré symmetry in the context of recently introduced Doubly Special Relativity (DSR) theories. We introduce four classes of modified relativistic theories with three of them describing various DSR frameworks. We consider four examples of modified relativistic symmetries, which illustrate each of the considered class.LaTeX, 7 pages, to appear in "Group24: Physical and Mathematical Aspects of Symmetry", the Proceedings of Group24- XXIV-th International Colloqium on Group-Theoretic Methods in Physics, Paris, 15-21.07.2002, Ed. J.P. Gazeau, R. Kerner et. al. IOP Publishing House, Bristol, 2002High Energy Physics - Theorytext