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- W1981011110 abstract "Necessary and sufficient conditions for the conformal invariance of a multiple integral variational problem whose Lagrangian depends upon second-order derivatives of a covariant vector field are obtained. These conditions take the form of differential identities involving the Lagrangian, its derivatives, and the infinitesimal generators of the special conformal group; they differ from the classical Noether identities in that they involve only second-order derivatives of the field, not fourth-order derivatives. The conditions are not conservation laws, but rather identities which provide a practical test for invariance which, if established, can lead to conservation laws via the Noether theorem. Finally, an application to 'generalised electrodynamics' is given." @default.
- W1981011110 created "2016-06-24" @default.
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- W1981011110 date "1977-08-01" @default.
- W1981011110 modified "2023-09-27" @default.
- W1981011110 title "Conformal identities for invariant second-order variational problems depending on a covariant vector field" @default.
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- W1981011110 doi "https://doi.org/10.1088/0305-4470/10/8/014" @default.
- W1981011110 hasPublicationYear "1977" @default.
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