A Coley et al 2004 Class. Quantum Grav. 21 5519 doi:10.1088/0264-9381/21/23/014
A Coley1, R Milson1, V Pravda2 and A Pravdová2
Show affiliationsWe study manifolds with Lorentzian signature and prove that all scalar curvature invariants of all orders vanish in a higher dimensional Lorentzian spacetime if and only if there exists an aligned non-expanding, non-twisting, geodesic null direction along which the Riemann tensor has negative boost order.
Issue 23 (7 December 2004)
Received 5 September 2004
Published 16 November 2004
A Coley et al 2004 Class. Quantum Grav. 21 5519
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