Completion of plane-symmetric metrics yielded by electromagnetic fields (Q1088179)

It is proved that the plane-symmetric metrics associated with the plane- symmetric nonnull electromagnetic fields given by \textit{P. S. Letelier} and \textit{R. R. Tabensky} [J. Math. Phys. 15, 594-595 (1974)], together with the plane-symmetric metrics associated with the semi-plane-symmetric null electromagnetic fields, given by \textit{J. J. Li} and \textit{C.-B. Liang} [Gen. Relativ. Gravitation 17, 1001-1014 (1985)], exhaust the planesymmetric metrics yielded by electromagnetic fields. A ''dual interpretation'' to the latter metrics, explaining them as being associated with null electromagnetic fields with source, is also given.