Born-Infeld-Einstein actions?

  title={Born-Infeld-Einstein actions?},
  author={Stanley Deser and G. W. Gibbons},
  journal={Classical and Quantum Gravity},
We present some obvious physical requirements on gravitational avatars of nonlinear electrodynamics and illustrate them with explicit determinantal Born - Infeld - Einstein models. A related procedure, using compensating Weyl scalars, permits us to formulate conformally invariant versions of these systems as well. 
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