Singularities in inflationary cosmology: A Review

@inproceedings{Borde1996SingularitiesII,
  title={Singularities in inflationary cosmology: A Review},
  author={A. H. de Borde and Alexander Vilenkin},
  year={1996}
}
We review here some recent results that show that inflationary cosmological models must contain initial singularities. We also present a new singularity theorem. The question of the initial singularity re-emerges in inflationary cosmology because inflation is known to be generically future-eternal. It is natural to ask, therefore, if inflationary models can be continued into the infinite past in a non-singular way. The results that we discuss show that the answer to the question is ``no.'' This… 

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