Decomposition of some pointed Hopf algebras given by the canonical Nakayama automorphism |
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Authors: | M. Grañ a,J.A. Guccione |
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Affiliation: | Depto de Matemática, FCEyN, Universidad de Buenos Aires, Pab. I, Ciudad Universitaria, 1428 - Buenos Aires, Argentina |
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Abstract: | Every finite dimensional Hopf algebra is a Frobenius algebra, with Frobenius homomorphism given by an integral. The Nakayama automorphism determined by it yields a decomposition with degrees in a cyclic group. For a family of pointed Hopf algebras, we determine necessary and sufficient conditions for this decomposition to be strongly graded. |
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Keywords: | Primary, 16W30 secondary, 16W50 |
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