Duality and Rational Modules in Hopf Alg
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J.Y Abuhlail; J GΓ³mez-Torrecillas; F.J Lobillo
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Article
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2001
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Elsevier Science
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English
β 155 KB
Let A be an algebra over a commutative ring R. If R is noetherian and A β’ is pure in R A , then the categories of rational left A-modules and right A β’ -comodules are isomorphic. In the Hopf algebra case, we can also strengthen the Blattner-Montgomery duality theorem. Finally, we give sufficient con