The phase-space view of f(R) gravity

@article{deSouza2007ThePV,
  title={The phase-space view of f(R) gravity},
  author={J. C. C. de Souza and Valerio Faraoni},
  journal={Classical and Quantum Gravity},
  year={2007},
  volume={24},
  pages={3637 - 3648}
}
We study the geometry of the phase space of spatially flat Friedmann–Lemaitre–Robertson–Walker models in f(R) gravity, for a general form of the function f(R). The equilibrium points (de Sitter spaces) and their stability are discussed, and a comparison is made with the phase space of the equivalent scalar-tensor theory. New effective Lagrangians and Hamiltonians are also presented. 
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