2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/58337It is shown that in the two-dimensional space-time the dynamic system, described by the free Klein-Gordon equation, turns to the dynamic system, described by the free Dirac equation, provided the current and the energy-momentum tensor are redefined in a proper way.13 pagesMathematical Physicstext