Substantive General Covariance: Another Decade of Dispute

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EPSA Philosophical Issues in the Sciences, Vol: 2, Page: 197-209

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Pooley, Oliver
Springer Nature; Springer Netherlands; Springer
Social Sciences; Arts and Humanities
book chapter description
John Earman's recent proposal that a substantive version of general covariance consists in the requirement that diffeomorphism invariance be a gauge symmetry is critically assessed. I argue that such a principle does not serve to differentiate general relativity from pre-relativistic theories. A model-theoretic characterization of two formulations of specially relativistic theories is suggested. Diffeomorphisms are symmetries of only one such style of formulation and, I argue, Earman's proposal does not provide a reason to deny diffeomorphisms the status of gauge transformations relative to this formulation. Carlo Rovelli's distinction between passive and active diffeomorphism invariance is also clarified. © 2010 Springer Science+Business Media B.V.