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arxiv: math/0501032 · v1 · submitted 2005-01-03 · 🧮 math.RA

Comatrix Corings an Invertible Bimodules

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keywords bimodulescomatrixcoringsgroupinvertibleassociatedautomorphismscanonical
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We extend Masuoka's Theorem [11] concerning the isomorphism between the group of invertible bimodules in a non-commutative ring extension and the group of automorphisms of the associated Sweedler's canonical coring, to the class of finite comatrix corings introduced in [6].

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