Topological censorship
From Wikipedia, the free encyclopedia
The topological censorship theorem states that general relativity does not allow an observer to probe the topology of spacetime: any topological structure collapses too quickly to allow light to traverse it. More precisely, in a globally hyperbolic, asymptotically flat spacetime satisfying the null energy condition, every causal curve from past null infinity to future null infinity is homotopic to a topologically trivial curve from past null to future null infinity.
[edit] References
- John L. Friedman, Kristin Schleich, and Donald M. Witt (1993). "Topological Censorship". Phys.Rev.Lett. 71: 1486–1489. doi:.
