Abstract
The nonlinear graviton construction of Penrose is given explicitly for the nonlinear superposition of a finite number of plane waves with arbitrary propagation directions, phase, and amplitude profiles. These are realized as generalizedH-spaces for which the asymptotic data are distributional and have singular support on a finite number of null generators ofI +.
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Porter, J.R. The nonlinear graviton: Superposition of plane waves. Gen Relat Gravit 14, 1023–1033 (1982). https://doi.org/10.1007/BF00756284
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DOI: https://doi.org/10.1007/BF00756284