Configuration spaces , FS op-modules , and Kazhdan-Lusztig polynomials of braid matroids

Configuration spaces , FS op-modules , and Kazhdan-Lusztig polynomials of braid matroids
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编织拟阵的配置空间、FS操作模块和Kazhdan-Lusztig多项式

DOI:
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发表时间:
2017
期刊:
影响因子:
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通讯作者:
Benjamin Young
Benjamin Young
中科院分区:
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文献类型:
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作者:
N. Proudfoot;Benjamin Young

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辫状拟阵的等变 Kazhdan-Lusztig 多项式可以解释为 C 中 n 个不同标记点的配置空间的某个部分紧化的交交上同调,被视为对称群 Sn 的分级表示。我们证明,在固定的上同调度下,对称群的表示序列自然地承认 FS 模块的结构,并且对偶 FS 模块是有限生成的。利用萨姆和斯诺登的工作,我们给出了这些表示的维度的渐近公式,并获得了不可约表示在其分解中出现的限制。
The equivariant Kazhdan-Lusztig polynomial of a braid matroid may be interpreted as the intersection cohomology of a certain partial compactification of the configuration space of n distinct labeled points in C, regarded as a graded representation of the symmetric group Sn. We show that, in fixed cohomological degree, this sequence of representations of symmetric groups naturally admits the structure of an FS-module, and that the dual FS-module is finitely generated. Using the work of Sam and Snowden, we give an asymptotic formula for the dimensions of these representations and obtain restrictions on which irreducible representations can appear in their decomposition.
DOI: 10.1007/s10801-015-0634-x
发表时间: 2015
影响因子: 0.8
作者:
Ardila F
通讯作者: Ardila F