Considering how the various forms of equivalence principle can lead to ambiguous discussions, I would like to know if more formal definitions for the various forms of the Equivalence Principles are available.(adsbygoogle = window.adsbygoogle || []).push({});

I would consider as "formal" all definitions that could be used (formally) to check if a theory satisfies this principle and eventually under which conditions it does.

For example, to avoid useless discussions about alleged contradictions between the EP and GR, a formal definition would make a formal and general proof crystal clear. I would also be interrested to see such a formal proof, although I consider it is rather obvious (WEP + sufficient smoothness of the equations).

Thanks for your help,

Michel

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# Formal definition of the Equivalence Principle(s)

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