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Tannaka-Krein duality for Hopf algebroids

Phung Ho Hai

math.QAarXiv:math/0206113

Abstract

We develop the Tannaka-Krein duality for monoidal functors with target in the categories of bimodules over a ring. The of such a functor turns out to be a Hopf algebroid over this ring. Using the result of a previous paper we characterize a small abelian, locally finite rigid monoidal category as the category of rigid comodules over a transitive Hopf algebroid.

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