Equatorial symmetry/antisymmetry of stationary axisymmetric electrovac spacetimes

Two theorems are proved concerning how stationary axisymmetric electrovac spacetimes that are equatorially symmetric or equatorially antisymmetric can be characterized correctly in terms of the Ernst potentials \E and $\Phi$ or in terms of axis-data.Comment: 8 page

Generalization of the Kerr-Newman solution

An exact four-parameter solution of the Einstein-Maxwell equations is derived. This solution constitutes a generalization of the Kerr-Newman metric. It incorporates a quadrupole deformation of a rotating charged mass. © 1992 Plenum Publishing Corporation