English

On actions of Drinfel'd doubles on finite dimensional algebras

Quantum Algebra 2018-05-29 v1 Rings and Algebras

Abstract

Let qq be an nthn^{th} root of unity for n>2n > 2 and let Tn(q)T_n(q) be the Taft (Hopf) algebra of dimension n2n^2. In 2001, Susan Montgomery and Hans-J\"urgen Schneider classified all non-trivial Tn(q)T_n(q)-module algebra structures on an nn-dimensional associative algebra AA. They further showed that each such module structure extends uniquely to make AA a module algebra over the Drinfel'd double of Tn(q)T_n(q). We explore what it is about the Taft algebras that leads to this uniqueness, by examining actions of (the Drinfel'd double of) Hopf algebras HH "close" to the Taft algebras on finite-dimensional algebras analogous to AA above. Such Hopf algebras HH include the Sweedler (Hopf) algebra of dimension 4, bosonizations of quantum linear spaces, and the Frobenius-Lusztig kernel uq(sl2)u_q(\mathfrak{sl}_2).

Keywords

Cite

@article{arxiv.1805.10340,
  title  = {On actions of Drinfel'd doubles on finite dimensional algebras},
  author = {Zachary Cline},
  journal= {arXiv preprint arXiv:1805.10340},
  year   = {2018}
}

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28 pages, 1 table