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Part 1: Theoretical equivalence in physics
Author(s) -
Weatherall James Owen
Publication year - 2019
Publication title -
philosophy compass
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.973
H-Index - 25
ISSN - 1747-9991
DOI - 10.1111/phc3.12592
Subject(s) - equivalence (formal languages) , logical equivalence , categorical variable , interpretation (philosophy) , epistemology , mathematics , dynamic and formal equivalence , calculus (dental) , mathematical economics , pure mathematics , computer science , philosophy , linguistics , artificial intelligence , medicine , statistics , dentistry , machine translation
I review the philosophical literature on the question of when two physical theories are equivalent. This includes a discussion of empirical equivalence, which is often taken to be necessary, and sometimes taken to be sufficient, for theoretical equivalence; and “interpretational” equivalence, which is the idea that two theories are equivalent just in case they have the same interpretation. It also includes a discussion of several formal notions of equivalence that have been considered in the recent philosophical literature, including (generalized) definitional equivalence and categorical equivalence. The article concludes with a brief discussion of the relationship between equivalence and duality. The article is in two parts; this is Part 1, which addresses empirical equivalence and definitional equivalence.