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arXiv 1702.04288math.CO
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关于随机张量多面体的顶点数

On the number of vertices of the stochastic tensor polytope

Zhongshan Li, Fuzhen Zhang, Xiao-Dong Zhang

摘要:

本文研究了$n\times n\times n$随机张量多面体顶点数的上界(即,维度为$n$的三重随机阵列)。通过使用关于多面体的已知结果(即,上、下界定理),给出了一些新的下界和上界.我们证明了新的上界比Chang,Paksoy和Zhang [Ann. Funct. Anal. 2016年第7期,编号~ 386--393],也比Linial和Luria的[离散计算]更尖锐。Geom.51(2014),no.~ 1,161- 170]。我们证明了类似的下界得到这样的方式,但是,并不比现有的。

英文摘要:

This paper is devoted to the study of lower and upper bounds for the number of vertices of the polytope of $n\times n\times n$ stochastic tensors (i.e., triply stochastic arrays of dimension $n$). By using known results on polytopes (i.e., the Upper and Lower Bound Theorems), we present some new lower and upper bounds. We show that the new upper bound is tighter than the one recently obtained by Chang, Paksoy and Zhang [Ann. Funct. Anal. 7 (2016), no.~3, 386--393] and also sharper than the one in Linial and Luria's [Discrete Comput. Geom. 51 (2014), no.~1, 161--170]. We demonstrate that the analog of the lower bound obtained in such a way, however, is no better than the existing ones.

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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