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arXiv 2403.10366math.QAmath.CT
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分次舒尔引理与分次交换代数上诱导模的分次幺半结构

A Graded Schur Lemma and a graded-monoidal structure for induced modules over graded-commutative algebras

Jürgen Fuchs, Tobias Grøsfjeld

AI总结:

本文在有限阿贝尔群分次和辫化幺半范畴框架下推广舒尔引理,并证明当代数按分次群双特征标交换时,诱导模范畴具有由双特征标扭转的分次幺半结构,从而统一并推广了超代数情形。

摘要:

我们考虑在幺半范畴内部、按有限阿贝尔群分次的代数与弗罗贝尼乌斯代数。对于A是线性阿贝尔幺半范畴中的扭群代数这一情形,我们得到了诱导A-模范畴的舒尔引理的分次推广。我们进一步证明:如果该幺半范畴是辫化的,并且A在分次群的双特征标意义下是交换的,那么诱导A-模范畴可以被赋予一个由该双特征标扭转的分次幺半结构。在分次群为Z/2Z的特殊情形下,这些结果再现了关于超代数与超幺半结构的已知结论。

英文摘要:

We consider algebras and Frobenius algebras, internal to a monoidal category, that are graded over a finite abelian group. For the case that A is a twisted group algebra in a linear abelian monoidal category we obtain a graded generalization of the Schur Lemma for the category of induced A-modules. We further show that if the monoidal category is braided and A is commutative up to a bicharacter of the grading group, then the category of induced A-modules can be endowed with a graded-monoidal structure that is twisted by the bicharacter. In the particular case that the grading group is Z/2Z, these findings reproduce known results about superalgebras and super-monoidal structures.

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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