2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/56936We outline a cohomological treatment for multivalued (classical) action functionals. We point out that an application of Takens' theorem, after Zuckerman, Deligne and Freed, allows to conclude that multivalued functionals yield globally defined variational equations.9 pages, AMSLaTeX (amsart class). Version to appear in Letters in Mathematical PhysicsMathematical PhysicsHigh Energy Physics - TheoryAlgebraic TopologyDifferential Geometrytext