2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/35683We show that the covariant derivative of Dirac fermion fields in the presence of a general linear connection on a world manifold is universal for Einstein's, gauge and affine-metric gravitation theories.10 pp, LaTeX fileGeneral Relativity and Quantum CosmologyHigh Energy Physics - Theorytext