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  Tensor representations for the Drinfeld double of the Taft algebra

Benkart, G., Biswal, R., Kirkman, E., Nguyen, V. C., & Zhu, J. (2022). Tensor representations for the Drinfeld double of the Taft algebra. Journal of Algebra, (606), 764-797. doi:10.1016/j.jalgebra.2022.04.041.

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 Creators:
Benkart, Georgia, Author
Biswal, Rekha1, Author           
Kirkman, Ellen, Author
Nguyen, Van C., Author
Zhu, Jieru, Author
Affiliations:
1Max Planck Institute for Mathematics, Max Planck Society, ou_3029201              

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Free keywords: Mathematics, Rings and Algebras, Representation Theory
 Abstract: Over an algebraically closed field $\mathbb k$ of characteristic zero, the
Drinfeld double $D_n$ of the Taft algebra that is defined using a primitive
$n$th root of unity $q \in \mathbb k$ for $n \geq 2$ is a quasitriangular Hopf
algebra. Kauffman and Radford have shown that $D_n$ has a ribbon element if and
only if $n$ is odd, and the ribbon element is unique; however there has been no
explicit description of this element. In this work, we determine the ribbon
element of $D_n$ explicitly. For any $n \geq 2$, we use the R-matrix of $D_n$
to construct an action of the Temperley-Lieb algebra $\mathsf{TL}_k(\xi)$ with
$\xi = -(q^{\frac{1}{2}}+q^{-\frac{1}{2}})$ on the $k$-fold tensor power
$V^{\otimes k}$ of any two-dimensional simple $D_n$-module $V$. This action is
known to be faithful for arbitrary $k \geq 1$. We show that
$\mathsf{TL}_k(\xi)$ is isomorphic to the centralizer algebra
$\text{End}_{D_n}(V^{\otimes k})$ for $1 \le k \le 2n-2$.

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Language(s): eng - English
 Dates: 2022
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2012.15277
DOI: 10.1016/j.jalgebra.2022.04.041
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Title: Journal of Algebra
Source Genre: Journal
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Publ. Info: Elsevier
Pages: - Volume / Issue: (606) Sequence Number: - Start / End Page: 764 - 797 Identifier: -