Derives Lagrangian mechanics for relativistic particles and fields from the postulates of special relativity, recovering E=mc² and Lorentz invariance of EM equations.
∂ ∂q ·” we denote the divergence with respect to the coordinates q. We refrain from using the usual “ ∇·
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Demystifying the Lagrangians of special relativity
Derives Lagrangian mechanics for relativistic particles and fields from the postulates of special relativity, recovering E=mc² and Lorentz invariance of EM equations.