If the action of a theory is invariant under a transformation (i.e. a lorentz transformation or a spacetime translation), does this imply that the Lagrangian is also invariant under the transformation?(adsbygoogle = window.adsbygoogle || []).push({});

[tex] L \to L + \delta L \;\;;\;\; \delta L = 0[/tex]?

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# Invariance of the action under a transformation

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