Log-Concave Polynomials III: Mason's Ultra-Log-Concavity Conjecture for Independent Sets of Matroids

Log-Concave Polynomials III: Mason's Ultra-Log-Concavity Conjecture for Independent Sets of Matroids
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对数凹多项式 III:梅森独立拟阵集的超对数凹性猜想

DOI:
10.1090/proc/16724
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发表时间:
2018
期刊:
ArXiv
影响因子:
--
通讯作者:
C. Vinzant
C. Vinzant
中科院分区:
--
文献类型:
--
作者:
Nima Anari;Kuikui Liu;S. Gharan;C. Vinzant

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我们给出了Mason猜想的最强版本的一个自包含证明,即对于任何拟阵,给定大小的独立集的个数的序列是超对数凹的。为此,我们引入了一类称为完全对数凹多项式的多项式,它的二元约束具有超对数凹系数。在证明的核心部分,我们证明了对于任何拟阵,其独立集的生成多项式的齐次化是完全对数凹的。
We give a self-contained proof of the strongest version of Mason’s conjecture, namely that for any matroid the sequence of the number of independent sets of given sizes is ultra log-concave. To do this, we introduce a class of polynomials, called completely log-concave polynomials, whose bivariate restrictions have ultra log-concave coefficients. At the heart of our proof we show that for any matroid, the homogenization of the generating polynomial of its independent sets is completely log-concave.
DOI: 10.4007/annals.2018.188.2.1
发表时间: 2018-09-01
影响因子: 4.9
作者:
Adiprasito, Karim;Huh, June;Katz, Eric
通讯作者: Katz, Eric