2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/209306Following an approach proposed by Rosser for deriving the transformation equations of volume charge density and current density we derive the transformation equations for the space-time coordinates of the same event, for the mass and the momentum of the same particle and for the electric and the magnetic field generated by the same distribution of electric charges.9 pages, 2 figuresGeneral Physicstext