Nonequivalence of equivalence principles

@article{Casola2015NonequivalenceOE,
  title={Nonequivalence of equivalence principles},
  author={Eolo Di Casola and Stefano Liberati and Sebastiano Sonego},
  journal={American Journal of Physics},
  year={2015},
  volume={83},
  pages={39-46}
}
Equivalence principles played a central role in the development of general relativity. Furthermore, they have provided operative procedures for testing the validity of general relativity, or constraining competing theories of gravitation. This has led to a flourishing of different, and inequivalent, formulations of these principles, with the undesired consequence that often the same name, “equivalence principle,” is associated with statements having a quite different physical meaning. In this… 

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