Born - Infeld - Einstein actions?

S Deser, G W Gibbons
1998 Classical and quantum gravity  
We present some obvious physical requirements on gravitational avatars of non-linear 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.
doi:10.1088/0264-9381/15/5/001 fatcat:guly277rsjctfcaunjuohhl3xu