Modular quasi-Hopf algebras and groups with one involution

Modular quasi-Hopf algebras and groups with one involution
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模拟 Hopf 代数和一次对合群

DOI:
10.1016/j.jpaa.2022.107264
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发表时间:
2023
影响因子:
0.8
通讯作者:
Ng, Siu-Hung
Ng, Siu-Hung
中科院分区:
数学2区
文献类型:
--
作者:
Mason, Geoffrey;Ng, Siu-Hung

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在前一篇文章中,作者构造了一类与有限群G相关联的拟Hopf代数D ω(G,A),推广了扭量子偶构造.给出了模范畴Rep(D ω(G,A))是模张量范畴的上同调充要条件.本文证明了群类G含有唯一对合的上同调条件,从而得到了一类新的模拟Hopf代数的显式构造.我们发展了一般有限群G的基本理论,同时也发展了关于Rep(D ω(G,A))何时是超模而不是模的平行理论.我们给出了一些明确的例子,涉及二元多面体群和一些零星的单群。
In a previous paper the authors constructed a class of quasi-Hopf algebras D ω (G, A) associated to a finite group G, generalizing the twisted quantum double construction. We gave necessary and sufficient conditions, cohomological in nature, that the corresponding module category Rep (D ω (G, A)) is a modular tensor category. In the present paper we verify the cohomological conditions for the class of groups G which contain a unique involution, and in this way we obtain an explicit construction of a new class of modular quasi-Hopf algebras. We develop the basic theory for general finite groups G, and also a parallel theory concerned with the question of when Rep (D ω (G, A)) is super-modular rather than modular. We give some explicit examples involving binary polyhedral groups and some sporadic simple groups.
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