The Topology of the Universe
Abstract
The Hilbert-Einstein equations are insufficient to describe the geometry of the Universe, as they only constrain a local geometrical property: curvature. A global knowledge of the geometry of space, if possible, would require measurement of the topology of the Universe. Since the subject was discussed in 1900 by Schwarzschild, observational attempts to measure global topology have been rare for most of this century, but have accelerated in the 1990's due to the rapidly increasing amount of observations of non-negligible fractions of the observational sphere. A brief review of basic concepts of cosmic topology and of the rapidly growing gamut of diverse and complementary observational strategies for measuring the topology of the Universe is provided here.
Cite
@article{arxiv.astro-ph/0010185,
title = {The Topology of the Universe},
author = {Boudewijn F. Roukema},
journal= {arXiv preprint arXiv:astro-ph/0010185},
year = {2014}
}
Comments
invited review of cosmic topology for the non-specialist, 11 pages, 3 figures, appearing in Bull. Astron. Soc. India