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General Relativity and Gravitation

, Volume 19, Issue 5, pp 465–479 | Cite as

Nonlinear gravitational Lagrangians

  • G. Magnano
  • M. Ferraris
  • M. Francaviglia
Research Articles

Abstract

“Alternative gravitational theories” based on Lagrangian densities that depend in a nonlinear way on the Ricci tensor of a metric are considered. It is shown that, provided certain weak regularity conditions are met, any such theory is equivalent, from the Hamiltonian point of view, to the standard Einstein theory for a new metric (which, roughly speaking, coincides with the momentum canonically conjugated to the original metric), interacting with external matterfields whose nature depends on the original Lagrangian density.

Keywords

Differential Geometry Regularity Condition Lagrangian Density Ricci Tensor Gravitational Theory 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Publishing Corporation 1987

Authors and Affiliations

  • G. Magnano
    • 1
  • M. Ferraris
    • 1
  • M. Francaviglia
    • 1
  1. 1.Istituto di Fisica Matematica “J.-L. Lagrange”Università di TorinoTorinoItaly

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