2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/60164A regular Poisson manifold can be described as a foliated space carrying a tangentially symplectic form. Examples of foliations are produced here that are not induced by any Poisson structure although all the basic obstructions vanish.18 pages, postscript fileDifferential GeometrySymplectic Geometry53D17; 53C12text