Lagrangian analysis of `trivial' symmetries in models of gravity


We study the differences between Poincare and canonical hamiltonian symmetries in models of gravity through the corresponding Noether identities and show that they are equivalent modulo trivial gauge symmetries.Comment: 4 pages, LaTeX; Based on presentation at the conference "Relativity and Gravitation: 100 Years after Einstein in Prague," held in Prague, June 201

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