RELATIVISTIC NATURE OF COULOMBIAN INTERACTIONS
库伦作用的相对论性

Longitudinal waves arc eliminated from the operators Dμν Dρ in quantum electrodynamics, which govcrn the change of the wave functional as we change from one Lorentz observer to another, and the resulting operators are found to satisfy the same set of commutation relations as before. This reveals that a theory with explicit Coulombian interactions may be relativistic, contrary to the usual belief.