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arXiv 2407.06008math.COmath.RT
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仿射超平面排列的相交矩阵

An Intersection Matrix for Affine Hyperplane Arrangements

Jens Niklas Eberhardt, Carl Mautner

AI总结:

本文为实仿射超平面排列定义整数相交矩阵及其 $q$-形变,证明其行列式仅依赖于底层拟阵的组合结构,并给出表示论解释。

摘要:

对于一个实仿射超平面排列,我们定义了一个整数相交矩阵,其自然 $q$-形变与排列中有界腔的相交相关。通过将该整数矩阵与 Schechtman-Varchenko 的双线性型联系起来,我们证明其行列式存在一个闭公式,该公式仅依赖于底层拟阵的组合结构。我们猜想其 $q$-形变也有类似的公式。我们的工作还更一般地适用于仿射定向拟阵的情形。此外,我们利用 Braden-Licata-Proudfoot-Webster 的超环面范畴 $\mathcal{O}$(或更一般地,Kowalenko-Mautner 针对定向拟阵程序定义的范畴 $\mathcal{O}$)给出了 $q$-相交矩阵的表示论解释。本文是一个更广泛计划的一部分,该计划旨在对 Braden-Mautner 定义的拟阵 Schur 代数进行范畴化。

英文摘要:

For a real affine hyperplane arrangement, we define an integer intersection matrix with a natural $q$-deformation related to the intersections of bounded chambers of the arrangement. By connecting the integer matrix to a bilinear form of Schechtman-Varchenko, we show that there is a closed formula for its determinant that only depends on the combinatorics of the underlying matroid. We conjecture an analogous formula for its $q$-deformation. Our work also applies more generally in the setting of affine oriented matroids. Additionally, we give a representation-theoretic interpretation of our $q$-intersection matrix using Braden-Licata-Proudfoot-Websters's hypertoric category $\mathcal{O}$ (or more generally Kowalenko-Mautner's category $\mathcal{O}$ for oriented matroid programs). This paper is part of a broader program to categorify matroidal Schur algebras defined by Braden-Mautner.

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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