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Gravitational soliton
A gravitational soliton is a soliton solution of the Einstein field equation. It can be separated into two kinds, a soliton of the vacuum Einstein equation generated by the Belinski-Zakharov transform, and a soliton of the Maxwell-Einstein equations generated by the Belinski-Zakharov-Alekseev transform.[1]
References
Belinski, V.; Verdaguer, E. (2001). Gravitational Solitons. Cambridge Monographs on Mathematical Physics. Cambridge University Press. ISBN 978-0521805865.
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