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Varying without varying: Reparameterisations, Diffeomorphisms, General Covariance, Lie derivatives, and all that. (arXiv:2004.04178v1 [gr-qc]) http://arxiv.org/abs/2004.04178
Varying without varying: Reparameterisations, Diffeomorphisms, General Covariance, Lie derivatives, and all that. (arXiv:2004.04178v1 [gr-qc]) http://arxiv.org/abs/2004.04178