Comatrix Corings an Invertible Bimodules
L. El Kaoutit, J. Gomez-Torrecillas
Abstract
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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