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Lorentz invariance

  • Lorentz Invariance of the Four-Potential

    the four-potential is invariant under Lorentz transformations.Lorentz invariance is at the core of any (special) relativistic theory. Sometimes, however, we encounter expressions that seem to transform in a wrong way. This is especially true for the four-potential calculated from the retarded four-current. Find out why the four-potential is indeed Lorentz invariant!