arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2303.02253math.CO
收藏

辫子拟阵的Kazhdan-Lusztig多项式

Kazhdan-Lusztig polynomials of braid matroids

Luis Ferroni, Matt Larson

AI总结:

本研究给出$\text{A}_{n-1}$型辫子拟阵Kazhdan-Lusztig多项式的组合解释及等变版本,以串并联网络拟阵为核心对象,证明了相关首项系数猜想并给出显式生成函数。

摘要:

我们对由$\text{A}_{n-1}$型辫子构形导出的拟阵的Kazhdan–Lusztig多项式给出了组合解释,这一结果可解释辫子构形倒易平面的相交上同调贝蒂数。此外,我们证明了该结果的等变版本。核心组合对象是一类由串并联网络导出的拟阵。作为推论,我们证明了Elias、Proudfoot与Wakefield提出的关于辫子拟阵Kazhdan-Lusztig多项式首项系数的猜想,并给出了其Kazhdan-Lusztig多项式与$Z$-多项式的显式生成函数。

英文摘要:

We provide a combinatorial interpretation of the Kazhdan--Lusztig polynomial of the matroid arising from the braid arrangement of type $\mathrm{A}_{n-1}$, which gives an interpretation of the intersection cohomology Betti numbers of the reciprocal plane of the braid arrangement. Moreover, we prove an equivariant version of this result. The key combinatorial object is a class of matroids arising from series-parallel networks. As a consequence, we prove a conjecture of Elias, Proudfoot, and Wakefield on the top coefficient of Kazhdan--Lusztig polynomials of braid matroids, and we provide explicit generating functions for their Kazhdan--Lusztig and $Z$-polynomials.

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。

↑