Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2001-05-18
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
6 pages, no figures
Scientific paper
New type III and type N approximate solutions which are regular in the linear approximation are shown to exist. For that, we use complex transformations on self-dual Robinson-Trautman metrics rather then the classical approach. The regularity criterion is the boundedness and vanishing at infinity of a scalar obtained by saturating the Bel-Robinson tensor of the first approximation by a time-like vector which is constant with respect to the zeroth approximation.
Downes Philip
MacAllevey Paul
Nita Bogdan
Robinson Ivor
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