Log-concavity of matroid h-vectors and mixed Eulerian numbers

Log-concavity of matroid h-vectors and mixed Eulerian numbers
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拟阵 h 向量和混合欧拉数的对数凹性

DOI:
10.1215/00127094-2023-0021
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发表时间:
2020
影响因子:
2.5
通讯作者:
Dennis Tseng
Dennis Tseng
中科院分区:
数学1区
文献类型:
--
作者:
A. Berget;Hunter Spink;Dennis Tseng

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对于任意矩阵$M$,我们利用由Grassmannians产生的组合Chow环$A^\bullet(M)$中某些重言类的混合交数计算Tutte多项式$T_M(x,y)$。利用混合Hodge-Riemann关系,我们推导出了矩阵复合体h向量的对数凹性的强化,改进了Dawson的一个旧猜想,该猜想最近由Ardila, Denham和Huh宣布。
For any matroid $M$, we compute the Tutte polynomial $T_M(x,y)$ using the mixed intersection numbers of certain tautological classes in the combinatorial Chow ring $A^\bullet(M)$ arising from Grassmannians. Using mixed Hodge-Riemann relations, we deduce a strengthening of the log-concavity of the h-vector of a matroid complex, improving on an old conjecture of Dawson whose proof was announced recently by Ardila, Denham and Huh.
拟阵的拉格朗日几何
DOI: 10.1090/jams/1009
发表时间: 2023
影响因子: 3.9
作者:
Ardila, Federico;Denham, Graham;Huh, June
通讯作者: Huh, June
DOI: 10.4007/annals.2018.188.2.1
发表时间: 2018-09-01
影响因子: 4.9
作者:
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DOI: 10.1016/j.aim.2022.108646
发表时间: 2020-02
影响因子: 1.7
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通讯作者: Tom Braden;June Huh;Jacob P. Matherne;N. Proudfoot;Botong Wang
DOI: 10.1216/jca.2020.12.77
发表时间: 2020
影响因子: 0.6
作者:
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通讯作者: Woo, Alexander