arXivDaily arXiv每日学术速递 周一至周五更新
arXiv math/0608712math.RT
收藏

对称代数的导出范畴的精细Hochschild不变量

Fine Hochschild invariants of derived categories for symmetric algebras

Alexander Zimmermann

摘要:

设$A$是完备域$k$上的对称$k$ -代数. Külshammer对任意整数$n$定义了一个关于0次Hochschild上同调的映射$ζ\_n$和一个关于$A$的0次霍赫希尔德同调调的映射$κ\_n$,作为相应的$p$ -幂映射关于对称化双线性形式的伴随映射。在较早的文件中,它表明,$ζ\_n$是不变的派生等价。本文将$κ\_n$的定义推广到更高的霍赫希尔德同调,并证明了$κ$的不变性及其在导出等价下的推广.这提供了导出范畴的精细不变量。

英文摘要:

Let $A$ be a symmetric $k$-algebra over a perfect field $k$. Külshammer defined for any integer $n$ a mapping $ζ\_n$ on the degree 0 Hochschild cohomology and a mapping $κ\_n$ on the degree 0 Hochschild homology of $A$ as adjoint mappings of the respective $p$-power mappings with respect to the symmetrizing bilinear form. In an earlier paper it is shown that $ζ\_n$ is invariant under derived equivalences. In the present paper we generalize the definition of $κ\_n$ to higher Hochschild homology and show the invariance of $κ$ and its generalization under derived equivalences. This provides fine invariants of derived categories.

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。

↑