Abstract
In this note we give two new simple derivations of the “good-cut” equation, the equation which governs (complex) self-dual asymptotically flat gravitational fields. One of these derivations is remarkably simple, involving only a few lines. Our main point of interest, however, is in the second derivation. Though it is slightly more complicated, this method of derivation is almost certainly generalizable to cover real asymptotically flat space-times and thus lead to a generalization of the good-cut equation.
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Kozameh, C.N., Newman, E.T. A note on self-dual gravitational fields. Found Phys 15, 487–495 (1985). https://doi.org/10.1007/BF01889283
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DOI: https://doi.org/10.1007/BF01889283