Gravitational Observables and Local Symmetries

Abstract

Using a recent classification of local symmetries of the vacuum Einstein equations, it is shown that there can be no observables for the vacuum gravitational field (in a closed universe) built as spatial integrals of local functions of Cauchy data and their derivatives.

10 pages

References in corpus (2)

• Is General Relativity an 'Already Parametrized' Field Theory?
• Symmetries of the Einstein Equations

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