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On-shell Lagrangians as total derivatives and the generalized Komar charge (2506.14024v2)
Published 16 Jun 2025 in hep-th and gr-qc
Abstract: Lagrangians which transform homogeneously under a global transformation of the fields (a global rescaling, for instance) can be written on-shell as a total derivative which has a universal, solution-independent expression, using a functional version of the Euler theorem for homogeneous functions. We study the uniqueness of this expression and how this result can be used in the construction of generalized Komar charges.
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