PhilSci Archive

General Covariance and the Objectivity of Space-time Point-events

Lusanna, Luca and Pauri, Massimo (2005) General Covariance and the Objectivity of Space-time Point-events. [Preprint]

WarningThere is a more recent version of this item available.
[img]
Preview
PDF
Download (224Kb) | Preview

    Abstract

    "The last remnant of physical objectivity of space-time" is disclosed, beyond the Leibniz equivalence, in the case of a continuous family of spatially non-compact models of general relativity. The physical individuation of point-events is furnished by the intrinsic degrees of freedom of the gravitational field, (viz, the "Dirac observables") that represent - as it were - the "ontic" part of the metric field. The physical role of the "epistemic" part (viz. the "gauge" variables) is likewise clarified. At the end, a peculiar four-dimensional "holistic and structuralist" view of space-time emerges which includes elements common to the tradition of both substantivalism and relationism. The observables of our models undergo real "temporal change" and thereby provide a counter-example to the thesis of the "frozen-time" picture of evolution.


    Export/Citation:EndNote | BibTeX | Dublin Core | ASCII/Text Citation (Chicago) | HTML Citation | OpenURL
    Social Networking:

    Item Type: Preprint
    Keywords: Hole Argument/Space-time Objectivity/Physical Individuation/ Dirac Observables/Gauge Freedom/Temporal Change
    Subjects: Specific Sciences > Physics > Relativity Theory
    Depositing User: Prof. Massimo Pauri
    Date Deposited: 25 Feb 2005
    Last Modified: 07 Oct 2010 11:13
    Item ID: 2207
    URI: http://philsci-archive.pitt.edu/id/eprint/2207

    Available Versions of this Item

    Actions (login required)

    View Item

    Document Downloads