par Henneaux, Marc 
;Kleinschmidt, Axel ;Gómez, Gustavo Lucena
Référence Proceedings of the Steklov Institute of Mathematics, 272, 1, page (141-150)
Publication Publié, 2011-04
;Kleinschmidt, Axel ;Gómez, Gustavo LucenaRéférence Proceedings of the Steklov Institute of Mathematics, 272, 1, page (141-150)
Publication Publié, 2011-04
Article révisé par les pairs
| Résumé : | Gauge symmetries lead to first-class constraints. This assertion is, of course, true only for non-trivial gauge symmetries, i. e., gauge symmetries that act non-trivially on-shell on the dynamical variables. We illustrate this well-appreciated fact for time reparametrization invariance in the context of modifications of gravity-suggested in a recent proposal by Hořava-in which the Hamiltonian constraint is deformed by arbitrary spatial diffeomorphism invariant terms, where some subtleties are found to arise. © 2011 Pleiades Publishing, Ltd. |
