2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/92315We study Bell's inequality in relation to the Einstein-Podolsky-Rosen paradox in the relativistic regime. For this purpose, a relativistically invariant observable is used in the calculation of the Bell's inequality, which results in the maximally violated Bell's inequality in any reference frames.7 pages, no figures, REVTeX4; v2. version to appear in Phys. Rev. AQuantum PhysicsHigh Energy Physics - Theorytext