Journal of Number Theory ( IF 0.7 ) Pub Date : 2021-03-19 , DOI: 10.1016/j.jnt.2021.02.011 Jeremy J.F. Guo
In this paper, we prove that if is a polynomial with real zeros only, then the sequence satisfies the following inequalities , where . This inequality is equivalent to the higher order Turán inequality. It holds for the coefficients of the Riemann ξ-function, the ultraspherical, Laguerre and Hermite polynomials, and the partition function. Moreover, as a corollary, for the partition function , we prove that is increasing for . We also find that for a positive and log-concave sequence , the inequality is the sufficient condition for both the 2-log-concavity and the higher order Turán inequalities of . It is easy to verify that if , where , then the sequence satisfies this inequality.
中文翻译:
实根多项式系数的不等式
在本文中,我们证明 是仅具有实零的多项式,则序列 满足以下不等式 , 在哪里 。该不等式等效于较高阶的Turán不等式。它适用于黎曼ξ函数的系数,超球面多项式,Laguerre和Hermite多项式以及分配函数。此外,作为推论,用于分区功能,我们证明 为增加 。我们还发现对于正数和凹数序列不等式 是2对数凹度和高阶图兰不等式的充分条件 。很容易验证是否, 在哪里 ,然后是顺序 满足了这种不平等。