2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/83442An updated discussion of Lorentz symmetry violation in particle physics at very high energy is presented, focusing on applications of models of deformed Lorentz symmetry to high-energy astrophysics.Updated version of a talk given at the ICRC 1999 ConferenceGeneral Physicstext