Duality for finite Hopf algebras explained by corings
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dualityhopftheoremalgebrascoringfiniteactionsalgebra
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We 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.
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