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arXiv 0704.0195math.QAmath.RT
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幂零模范畴的群论性质

Group-theoretical properties of nilpotent modular categories

Vladimir Drinfeld, Shlomo Gelaki, Dmitri Nikshych, Victor Ostrik

摘要:

刻画了一类自然的素幂Frobenius-Perron维数模范畴作为有限p-群的扭双的表示范畴.我们还表明,幂零编织融合范畴C承认一个类似的Sylow分解。如果C的简单对象有积分Frobenius-Perron维数,则C是群论的。由此,我们得到了素数幂维数的半单拟霍普夫代数是群论的.我们的论点是基于重建扭曲群双拉格朗日子范畴的模块化范畴(这是让人想起双准李双代数的Manin对的特征)。

英文摘要:

We characterize a natural class of modular categories of prime power Frobenius-Perron dimension as representation categories of twisted doubles of finite p-groups. We also show that a nilpotent braided fusion category C admits an analogue of the Sylow decomposition. If the simple objects of C have integral Frobenius-Perron dimensions then C is group-theoretical. As a consequence, we obtain that semisimple quasi-Hopf algebras of prime power dimension are group-theoretical. Our arguments are based on a reconstruction of twisted group doubles from Lagrangian subcategories of modular categories (this is reminiscent to the characterization of doubles of quasi-Lie bialgebras in terms of Manin pairs).

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