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arXiv 1802.04056math.ACmath.AGmath.CV
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超平面排列的Solomon-Terao代数

Solomon-Terao algebra of hyperplane arrangements

Takuro Abe, Toshiaki Maeno, Satoshi Murai, Yasuhide Numata

摘要:

我们引入一个新的代数与超平面安排$\mathcal{A}$,称为Solomon-Terao代数$\mbox{ST}(\mathcal{A},η)$,其中$η$是一个齐次多项式。Solomon和Terao证明了当$η$是属时,$\mbox{ST}(\mathcal{A},η)$是Artinian的。这个代数可以被认为是超平面排列下的共不变代数的推广。Solomon-Terao代数类包含正则幂零Hessenberg簇的上同调环。证明了$\mbox{ST}(\mathcal{A},η)$是完全交的充要条件是$\mathcal{A}$是自由的.当$\mathcal{A}$是自由的时,给出了Hilbert多项式的一个因式分解公式,并提出了几个相关的问题和解答.

英文摘要:

We introduce a new algebra associated with a hyperplane arrangement $\mathcal{A}$, called the Solomon-Terao algebra $\mbox{ST}(\mathcal{A},η)$, where $η$ is a homogeneous polynomial. It is shown by Solomon and Terao that $\mbox{ST}(\mathcal{A},η)$ is Artinian when $η$ is generic. This algebra can be considered as a generalization of coinvariant algebras in the setting of hyperplane arrangements. The class of Solomon-Terao algebras contains cohomology rings of regular nilpotent Hessenberg varieties. We show that $\mbox{ST}(\mathcal{A},η)$ is a complete intersection if and only if $\mathcal{A}$ is free. We also give a factorization formula of the Hilbert polynomials when $\mathcal{A}$ is free, and pose several related questions, problems and conjectures.

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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