Cosmological theory without singularities.

@article{Brandenberger1993CosmologicalTW,
  title={Cosmological theory without singularities.},
  author={Brandenberger and Mukhanov and Sornborger},
  journal={Physical review. D, Particles and fields},
  year={1993},
  volume={48 4},
  pages={1629-1642}
}
A theory of gravitation is constructed in which all homogeneous and isotropic solutions are nonsingular, and in which all curvature invariants are bounded. All solutions for which curvature invariants approach their limiting values approach de Sitter space. The action for this theory is obtained by a higher-derivative modification of Einstein s theory. We expect that our model can easily be generalized to solve the singularity problem also for anisotropic cosmologies. 

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