2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/179795Following the technique of Müller-zum-Hagen, refs [1,2], we show that strictly static and strictly stationary solutions of the Einstein-Maxwell equations are analytic in harmonic coordinates. This holds whether or not the Maxwell field inherits the symmetry.11 pages; to appear in Gen.Rel.GravGeneral Relativity and Quantum Cosmologytext