2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/77171We consider real isotropic geodesics on manifolds endowed with a pseudoconformal structure and their applications to the theory of lightlike hypersurfaces on such manifolds, the geometry of four-dimensional conformal structures of Lorentzian type, and a classification of the Einstein spaces.LaTeX, 18 pagesDifferential Geometry53B25, 53A30 (Primary) 53A40 (Secondary)text