2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/72607We give a new existence proof for closed hypersurfaces of prescribed mean curvature in Lorentzian manifolds.15 pages, a pdf version can also be retrieved from http://www.math.uni-heidelberg.de/studinfo/gerhardt/H-surfacesLorentz.pdf and bibtex data from http://www.math.uni-heidelberg.de/studinfo/gerhardt/bibtexcg00.htmlDifferential Geometrytext