On Penrose's `before the big bang' ideas
General Relativity and Quantum Cosmology
2007-10-23 v2 Differential Geometry
Abstract
We point out that algebraically special Einstein fields with twisting rays exhibit the basic properties of conformal Universes considered recently by Roger Penrose.
Cite
@article{arxiv.0710.3879,
title = {On Penrose's `before the big bang' ideas},
author = {C. Denson Hill and Pawel Nurowski},
journal= {arXiv preprint arXiv:0710.3879},
year = {2007}
}
Comments
We changed our conventions, so that the sign of the cosmological constant agrees with the conventions of cosmologists