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Galois extensions as functors of comodules |
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| Authors: | K -H Ulbrich |
| Institution: | (1) Univ. Hamburg, Mathematisches Seminar, Bundesstr. 55, D-2000 Hamburg 13, Fed. Rep. Germany |
| 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. |
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