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arXiv 2003.13039math.CTmath.QA
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余单幺半群与张量范畴的形变理论

Cosimplicial monoids and deformation theory of tensor categories

Michael Batanin, Alexei Davydov

摘要:

本文对对称幺半群范畴${\bf V}$中的余单幺半群引入了$n$ -交换性($0\le n\le \infty$)的概念,其中$n=0$对应于${\bf V,}$中的余单幺半群,而$n=\infty$对应于交换的余单幺半群.如果${\bf V}$具有么半群模型结构,我们证明了(在一些温和的技术条件下)$n$ -余单么半群的全对象具有自然的$E_{n+1}$ -代数结构.我们的主要应用是张量范畴和张量函子的变形理论。我们证明了张量函子的变形复形是$1$ -交换余单幺半群的全复形,因此具有类似于Deligne猜想所提供的结合代数的Hochschild复形上的$E_2$ -结构的$E_2$ -代数结构.我们进一步证明了张量范畴的形变复形是$2$ -交换余单幺半群的全复形,因此自然是$E_3$ -代数。我们使这些结构非常明确,通过语言的Delannoy路径和他们的非交换提升。我们研究这些结构如何体现在具体的例子。

英文摘要:

We introduce a notion of $n$-commutativity ($0\le n\le \infty$) for cosimplicial monoids in a symmetric monoidal category ${\bf V}$, where $n=0$ corresponds to just cosimplicial monoids in ${\bf V,}$ while $n=\infty$ corresponds to commutative cosimplicial monoids. If ${\bf V}$ has a monoidal model structure we show (under some mild technical conditions) that the total object of an $n$-cosimplicial monoid has a natural $E_{n+1}$-algebra structure. Our main applications are to the deformation theory of tensor categories and tensor functors. We show that the deformation complex of a tensor functor is a total complex of a $1$-commutative cosimplicial monoid and, hence, has an $E_2$-algebra structure similar to the $E_2$-structure on Hochschild complex of an associative algebra provided by Deligne's conjecture. We further demonstrate that the deformation complex of a tensor category is the total complex of a $2$-commutative cosimplicial monoid and, therefore, is naturally an $E_3$-algebra. We make these structures very explicit through a language of Delannoy paths and their noncommutative liftings. We investigate how these structures manifest themselves in concrete examples.

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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