2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/122023Using the complete Dirac Hamiltonian for a relativistic electron it is shown that the spin transverse force derived by S.Q. Shen, Phys. Rev. Lett. 95, 187203 (2005) does not exist. This force is an artefact resulting from an approximate form of the employed Hamiltonian.2 pages, no figuresMaterials Sciencetext