Results 1 to 10 of about 476 (124)
Numerical Approaches to Spacetime Singularities [PDF]
Living Reviews in Relativity, 1998 This review updates a previous review article. Numerical explorationof the properties of singularities could, in principle, yield detailed understanding of their nature in physically realistic cases.
Berger Beverly K
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Trans-Planckian Censorship and Spacetime Singularities
Mathematics, 2023 We study the effects of trans-Planckian censorship conjecture (TCC) bounds on geodesic completeness of spacetime and the associated existence for an infinite proper time.
Spiros Cotsakis +2 more
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Spacetime singularities and invariance [PDF]
Belgrade Philosophical Annual, 2016 This paper explains why spacetime singularities do not constitute a breakdown of physical laws, and points out that the difference between the metrics at singularities and those outside of singularities is factual, rather than nomological.
Stoica Cristinel O., Toader Iulian D.
doaj +3 more sources
SPACETIME SINGULARITIES: RECENT DEVELOPMENTS [PDF]
International Journal of Modern Physics D, 2013 Recent developments concerning oscillatory spacelike singularities in general relativity are taking place on two fronts. The first treats generic singularities in spatially homogeneous cosmology, most notably Bianchi types VIII and IX. The second deals with generic oscillatory singularities in inhomogeneous cosmologies, especially those with two ...
Claes Uggla
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Penrose limits and spacetime singularities [PDF]
Classical and Quantum Gravity, 2004 We give a covariant characterisation of the Penrose plane wave limit: the plane wave profile matrix $A(u)$ is the restriction of the null geodesic deviation matrix (curvature tensor) of the original spacetime metric to the null geodesic, evaluated in a comoving frame.
Blau, M +3 more
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On the genericity of spacetime singularities [PDF]
Pramana - Journal of Physics, 2007 We consider here the genericity aspects of spacetime singularities that occur in cosmology and in gravitational collapse. The singularity theorems (that predict the occurrence of singularities in general relativity) allow the singularities of gravitational collapse to be either visible to external observers or covered by an event horizon of gravity. It
Pankaj S Joshi, Joshi Pankaj S
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Numerical Approaches to Spacetime Singularities
Living Reviews in Relativity, 2002 This Living Review updates a previous version which is itself an update of a review article. Numerical exploration of the properties of singularities could, in principle, yield detailed understanding of their nature in physically realistic cases ...
Berger Beverly K
exaly +2 more sources
Spacetime singularities and indeterminism
SynthĂseAbstract We argue for the claim that spacetime singularities in general relativity (GR) signal indeterminism, broadly construed. We first develop a schema for diagnosing a type of indeterminism for physical theories, which we denote by Indeterminism.
Feraz Azhar, Mohammad Hossein Namjoo
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A singular conformal spacetime [PDF]
Journal of Geometry and Physics, 2006 The infinite cosmological "constant" limit of the de Sitter solutions to Einstein's equation is studied. The corresponding spacetime is a singular, four-dimensional cone-space, transitive under proper conformal transformations, which constitutes a new example of maximally-symmetric spacetime. Grounded on its geometric and thermodynamic properties, some
Aldrovandi, R. +2 more
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Exploration of a singular fluid spacetime [PDF]
General Relativity and Gravitation, 2021 AbstractWe investigate the properties of a special class of singular solutions for a self-gravitating perfect fluid in general relativity: the singular isothermal sphere. For arbitrary constant equation-of-state parameter $$w=p/\rho $$ w = p /
openaire +4 more sources