Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Marcus Kriele"'
Autor:
Marcus Kriele
Publikováno v:
Classical and Quantum Gravity. 14:153-163
We study irrotational, three-dimensional dust spacetimes and show that their only dynamical singularities are shell singularities in the sense of Kriele, Lim and Scott (1994). These singularities are weak and generically naked.
Autor:
Marcus Kriele
Publikováno v:
General Relativity and Gravitation. 28:1409-1413
Publikováno v:
Classical and Quantum Gravity. 13:1161-1182
In a four-dimensional Lorentzian manifold, a family of light rays emanating orthogonally from a spacelike 2-surface generates a `wavefront'. The caustic of a wavefront is the set of all points where the wavefront fails to be an (immersed) submanifold
Autor:
Marcus Kriele, Giselle Lim
Publikováno v:
Classical and Quantum Gravity. 12:3019-3035
We study a class of singularities of prescribed behaviour and investigate physical properties such as their strength, and the validity of energy conditions in a neighbourhood of these singularities. As applications of our theory, we show that shell (
Publikováno v:
Classical and Quantum Gravity. 11:2761-2779
We introduce and give the motivation for the concept of shell singularities. Shell singularities are a generalization of shell crossing singularities to spacetimes which are not necessarily spherically symmetric. We give a definition of strong cosmic
Autor:
Marcus Kriele
Publikováno v:
Classical and Quantum Gravity. 11:1325-1330
Signature (type) changing spacetimes are the classical limit of a variant of the no-boundary proposal of Hartle and Hawking (1983). I study spacetimes where the Einstein equation is coupled to a scalar field and give a heuristic, semiclassical argume
Autor:
Marcus Kriele
Publikováno v:
Classical and Quantum Gravity. 10:1525-1539
The author shows that shell (crossing) singularities are at least marginally trapped, if the ratio of pressure and energy density tends to a nonzero constant for diverging energy density. This result gives strong support for weak cosmic censorship of
Autor:
Marcus Kriele
Publikováno v:
General Relativity and Gravitation. 22:619-623
We announce and justify two theorems (proofs will appear in Refs. 1 and 2): i) A generalization of the singularity theorem of Hawking and Penrose [3] to space-times with chronology violations. Although it is impossible to remove the chronology condit
Autor:
Marcus Kriele, Jerome Martin
There exists a widespread belief that signature type change could be used to avoid spacetime singularities. We show that signature change cannot be utilised to this end unless the Einstein equation is abandoned at the suface of signature type change.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a8915002d3759ec31336654c92e6640