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arXiv 1602.00521math.CO
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广义Narayana多项式的实根性

The Real-rootedness of Generalized Narayana Polynomials

Herman Z. Q. Chen, Arthur L. B. Yang, Philip B. Zhang

摘要:

本文证明了两类广义Narayana多项式的实根性:一类是由有限外尔群上的广义结合面体的$h$ -多项式引起的,另一类是由Boros-Moll多项式的无穷对数的研究引起的.对于前者,Brändén已经证明了这些$h$ -多项式只有实零点。我们建立了这两类Narayana多项式的某些递推关系,并由此得到了实根性。为了证明实根性,我们使用了一个充分条件,由于刘和王,以确定是否有两个多项式交错零点。借助Mathematica软件包\textit{HolonomicFunctions}对递推关系进行了验证。

英文摘要:

In this paper, we prove the real-rootedness of two classes of generalized Narayana polynomials: one arising as the $h$-polynomials of the generalized associahedron associated to the finite Weyl groups, the other arising in the study of the infinite log-concavity of the Boros-Moll polynomials. For the former, Brändén has already proved that these $h$-polynomials have only real zeros. We establish certain recurrence relations for the two classes of Narayana polynomials, from which we derive the real-rootedness. To prove the real-rootedness, we use a sufficient condition, due to Liu and Wang, to determine whether two polynomials have interlaced zeros. The recurrence relations are verified with the help of the Mathematica package \textit{HolonomicFunctions}.

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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