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arXiv · 1510.02714

On an injectivity lemma in the proof of Tannakian duality

Phùng Hô Hai
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Abstract

In this short work we give a very short and elementary proof of the injectivity lemma, which plays an important role in the Tannakian duality for Hopf algebras over a field. Based on this we provide some generalizations of this fact to the case of flat algebras over a noetherian domain.

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Phùng Hô Hai. 2015-10-09. On an injectivity lemma in the proof of Tannakian duality. https://doi.org/10.1142/s021949881650167x

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