Galois extensions as functors of comodules
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Abstract
Let A be a finite Hopf algebra over a commutative ring k. We show a one-to-one correspondence between the A-Galois extensions of k and certain functors from the category of A-comodules to the category of k-modules.
Keywords
Number Theory Algebraic Geometry Hopf Algebra Topological Group Commutative Ring
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© Springer-Verlag 1987