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Phys. Rev. Lett. 78, 783–786 (1997)

Very Simple Proof of the Causal Propagation of Gravity in Vacuum

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Miguel Á. G. Bonilla and José M. M. Senovilla
Departament de Física Fonamental, Universitat de Barcelona, Diagonal 647, E-08028 Barcelona, Spain

Received 10 October 1996; published in the issue dated 3 February 1997

In this Letter we present a new property of the Bel-Robinson tensor which allows us to give a very simple proof of the causal propagation of gravity in vacuum and that, moreover, provides an invariant characterization for Petrov type N space-times.

© 1997 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.78.783
DOI:
10.1103/PhysRevLett.78.783
PACS:
04.20.Cv, 04.20.Gz