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The Principle of Equivalence as a Criterion of Identity

Samaroo, Ryan (2018) The Principle of Equivalence as a Criterion of Identity. [Preprint]

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Abstract

In 1907 Einstein had the insight that bodies in free fall do not “feel” their own weight. This has been formalized in what is called “the principle of equivalence.” The principle motivated a critical analysis of the Newtonian and special-relativistic concepts of inertia, and it was indispensable to Einstein’s development of his theory of gravitation. A great deal has been written about the principle. Nearly all of this work has focused on the content of the principle and whether it has any content in Einsteinian gravitation, but more remains to be said about its methodological role in the development of the theory. I argue that the principle should be understood as a kind of foundational principle known as a criterion of identity. This work extends and substantiates a recent account of the notion of a criterion of identity by William Demopoulos. Demopoulos argues that the notion can be employed more widely than in the foundations of arithmetic and that we see this in the development of physical theories, in particular space-time theories. This new account forms the basis of a general framework for applying a number of mathematical theories and for distinguishing between applied mathematical theories that are and are not empirically constrained.


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Item Type: Preprint
Creators:
CreatorsEmailORCID
Samaroo, Ryan
Keywords: principle of equivalence, criterion of identity, foundations of space-time theories, foundations of physics, foundations of mathematics, application of mathematical theories, Frege, Einstein, Newton, Corollary VI, theory of theories
Subjects: Specific Sciences > Mathematics > Applicability
Specific Sciences > Mathematics > Epistemology
Specific Sciences > Mathematics > Foundations
Specific Sciences > Mathematics > Logic
Specific Sciences > Physics > Classical Physics
Specific Sciences > Mathematics
Specific Sciences > Physics
Specific Sciences > Physics > Relativity Theory
General Issues > Structure of Theories
General Issues > Theory Change
Depositing User: Dr Ryan Samaroo
Date Deposited: 05 Aug 2018 19:02
Last Modified: 05 Aug 2018 19:02
Item ID: 14915
Subjects: Specific Sciences > Mathematics > Applicability
Specific Sciences > Mathematics > Epistemology
Specific Sciences > Mathematics > Foundations
Specific Sciences > Mathematics > Logic
Specific Sciences > Physics > Classical Physics
Specific Sciences > Mathematics
Specific Sciences > Physics
Specific Sciences > Physics > Relativity Theory
General Issues > Structure of Theories
General Issues > Theory Change
Date: 2018
URI: http://philsci-archive.pitt.edu/id/eprint/14915

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