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arXiv 2108.09102math.QAmath.RA
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辫子张量范畴的中心

Centers of Braided Tensor Categories

Zhimin Liu, Shenglin Zhu

摘要:

设$\mathcal{C}$是有限辫子多重张量范畴.设$B$是$\mathcal{C}$的Majid自同构辫子群,则$B$是$\mathcal{C}$中的余交换霍普夫代数.我们证明了$\mathcal{C}$的中心同构于$\mathcal{C}$中的左$B$ -余模范畴,并且将$B$分解为不可分解的$\mathcal{C}$ -子余代数的直和导致将$B$ - $\operatorname*{Comod}_{\mathcal{C}}$分解为不可分解的$\mathcal{C}$ -模范畴的直和.作为应用,我们给出了半单拟三角弱霍普夫代数上不可约Yetter-Drinfeld模的结构的一个显式刻画.我们的结果推广了有限群和拟三角霍普夫代数上的结果。

英文摘要:

Let $\mathcal{C}$ be a finite braided multitensor category. Let $B$ be Majid's automorphism braided group of $\mathcal{C}$, then $B$ is a cocommutative Hopf algebra in $\mathcal{C}$. We show that the center of $\mathcal{C}$ is isomorphic to the category of left $B$-comodules in $\mathcal{C}$, and the decomposition of $B$ into a direct sum of indecomposable $\mathcal{C}$-subcoalgebras leads to a decomposition of $B$-$\operatorname*{Comod}_{\mathcal{C}}$ into a direct sum of indecomposable $\mathcal{C}$-module subcategories. As an application, we present an explicit characterization of the structure of irreducible Yetter-Drinfeld modules over semisimple quasi-triangular weak Hopf algebras. Our results generalize those results on finite groups and on quasi-triangular Hopf algebras.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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