Examples of polynomial identities distinguishing the Galois objects over finite-dimensional Hopf algebras

preprint2013arXivOpen access

Abstract

We define polynomial H-identities for comodule algebras over a Hopf algebra H and establish general properties for the corresponding T-ideals. In the case H is a Taft algebra or the Hopf algebra E(n), we exhibit a finite set of polynomial H-identities which distinguish the Galois objects over H up to isomorphism.

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