The annoying null boundaries
General Relativity and Quantum Cosmology
2018-03-14 v1 Differential Geometry
Abstract
We consider a class of globally hyperbolic space-times with "expanding singularities". Under suitable assumptions we show that no -extensions across a compact boundary exist, while the boundary must be null wherever differentiable (which is almost everywhere) in the non-compact case.
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Cite
@article{arxiv.1801.06037,
title = {The annoying null boundaries},
author = {Piotr T. Chruściel and Paul Klinger},
journal= {arXiv preprint arXiv:1801.06037},
year = {2018}
}
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15 pages