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Events and observables in generally invariant spacetime theories

Westman, Hans and Sonego, Sebastiano (2007) Events and observables in generally invariant spacetime theories. [Preprint]

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    Abstract

    We address the problem of observables in generally invariant spacetime theories such as Einstein's general relativity. Using the refined notion of an event as a "point-coincidence" between scalar fields that completely characterise a spacetime model, we propose a generalisation of the relational local observables that does not require the existence of four everywhere invertible scalar fields. The collection of all point-coincidences forms in generic situations a four-dimensional manifold, that is naturally identified with the physical spacetime.


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    Item Type: Preprint
    Additional Information: Also available at the LANL archive; code 0708.1825 [gr-qc]
    Keywords: Spacetime; Events; General covariance; Observables; Hole argument
    Subjects: Specific Sciences > Physics > Relativity Theory
    Depositing User: Sebastiano Sonego
    Date Deposited: 22 Aug 2007
    Last Modified: 07 Oct 2010 11:15
    Item ID: 3473
    URI: http://philsci-archive.pitt.edu/id/eprint/3473

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