2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/101880This paper can be seen as an exercise in how to adapt quantum mechanics from a strict relativistic perspective while being respectful and critical towards the experimental achievements of the contemporary theory. The result is a fully observer independent relativistic quantum mechanics for N particle systems without tachyonic solutions. A remaining worry for the moment is Bell's theorem.17 pages, no figures, entire subsection added. submitted to CQGGeneral Relativity and Quantum CosmologyQuantum Physicstext