arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0907.3335math.CTmath.QA
收藏

霍普夫代数、四模和n重幺半范畴范畴

Hopf algebras, tetramodules, and n-fold monoidal categories

Boris Shoikhet

摘要:

结合双代数$A$上的四模交换范畴与Gerstenhaber-Schack(GS)上同调关系为$Ext_\Tetra(A,A)=H_\GS(A)$ .在双代数的四元模范畴上构造了一个2重幺半群结构。设$C$是一个交换$n$ -折叠幺半群范畴,其单位对象为$A$ .在一定条件(*)下,证明了$Ext_C(A,A)$是一个$(n+1)$ -代数.在双代数的情况下,当$A$是一个Hopf代数时,这个条件(*)得到满足。最后证明了Hopf代数的GS上同调是3-代数。同时,我们考虑了整数上的(双)代数的这类问题。设$A$是$Z$上平坦的$Z$上的结合代数.证明了作用于其Hochschild上同调的算子是小圆盘算子的稳定同伦群的算子。

英文摘要:

The abelian category of tetramodules over an associative bialgebra $A$ is related with the Gerstenhaber-Schack (GS) cohomology as $Ext_\Tetra(A,A)=H_\GS(A)$. We construct a 2-fold monoidal structure on the category of tetramodules of a bialgebra. Suppose $C$ is an abelian $n$-fold monoidal category with the unit object $A$. We prove, provided some condition (*), that $Ext_C(A,A)$ is an $(n+1)$-algebra. In the case of bialgebras this condition (*) is satisfied when $A$ is a Hopf algebra. Finally, the GS cohomology of a Hopf algebra is a 3-algebra. As well, we consider this kind of questions of (bi)algebras over integers. Let $A$ be an associative algebra over $Z$ flat over $Z$. We prove that the operad acting on its Hochschild cohomology is the operad of stable homotopy groups of the little discs operad.

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。

↑