Black holes without singularities

doi:10.1007/BF00774083

Paper

Black holes without singularities

Published Oct 1, 1989 · R. Newman

General Relativity and Gravitation

17

Citations

0

Influential Citations

Full textSemantic Scholar

Abstract

The conventional interpretation of the Hawking-Penrose singularity theorems is that gravitational collapse, signified by the presence of a closed trapped surface, generally leads to the formation of a singularity. Consideration is given here to an alternative interpretation according to which collapse scenarios may give rise, not to singularities, but to chronology violation instead. An example is given of a singularity-free, chronology-violating space-time with a (non-achronal) closed trapped surface. In a large class of singularity-free space-times, the presence of a closed trapped surface, achronal or not, necessitates a violation of chronology. Moreover, all closed trapped surfaces and chronology violations are confined to black holes; weak cosmic censorship must hold in the sense that the region of the space-time visible from infinity is globally hyperbolic.

Study Snapshot

Gravitational collapse scenarios may lead to chronology violation, not singularities, in black holes, with closed trapped surfaces requiring weak cosmic censorship.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

Black holes without singularities

References

Citations