2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/74969We give a coring version for the duality theorem for actions and coactions of a finitely generated projective Hopf algebra. We also provide a coring analogue for a theorem of H.-J. Schneider, which generalizes and unifies the duality theorem for finite Hopf algebras and its refinements.7 pagesRings and AlgebrasQuantum Algebra16W30text