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arXiv 1504.07348math.COmath.AG
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对称倒易平面的交上同调

Intersection cohomology of the symmetric reciprocal plane

Nicholas Proudfoot, Max Wakefield, Benjamin Young

摘要:

通过证明的第i个系数等于在(n-i+1)-边形中选择i个不相交弦的方法的个数,计算了n元上秩为n-1的一致拟阵的Kazhdan-Lusztig多项式.我们还证明了相应的交上同调群同构于与划分[n-2 i,2,.,n-1]相关联的对称群的不可约表示,2]。

英文摘要:

We compute the Kazhdan-Lusztig polynomial of the uniform matroid of rank n-1 on n elements by proving that the i-th coefficient of is equal to the number of ways to choose i non-intersecting chords in an (n-i+1)-gon. We also show that the corresponding intersection cohomology group is isomorphic to the irreducible representation of the symmetric group associated to the partition [n-2i,2,...,2].

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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