用Pochhammer多项式展开分析黎曼ζ函数零点
Analysis of Riemann Zeta-Function Zeros using Pochhammer Polynomial Expansions
摘要:
Riemann函数Xi(t)属于一类整函数,它可以展开为对称Pochhammer多项式的一致收敛级数,依赖于一个实尺度参数β。可以证明,多项式逼近Xi(n,t,beta)到Xi(t)仅在渐近标度极限beta->无穷大中具有不同的实根。因此,可以推断对于n->无穷大,存在递增的β序列beta(n)->无穷大,使得Xi(n,t,beta(n))仅对所有n具有实根,并且对于每个整函数,可以关联满足特定差分方程的唯一最小β序列。数值分析表明与Riemann Xi(t)相关的最小beta(n)序列具有明显的亚对数增长率,并且可以证明当n->无穷大时,如果beta(n)=o(log(n)),则近似Xi(n,t,beta(n))收敛于Xi(t).证明了复分析中的Hurwitz定理,并对最小β序列的渐近性质进行了形式化分析,确定了一个基本机制,从而有力地证实了黎曼假设的有效性.
英文摘要:
The Riemann Xi-function Xi(t) belongs to a family of entire functions which can be expanded in a uniformly convergent series of symmetrized Pochhammer polynomials depending on a real scaling parameter beta. It can be shown that the polynomial approximant Xi(n,t,beta) to Xi(t) has distinct real roots only in the asymptotic scaling limit beta->infinity. One may therefore infer the existence of increasing beta-sequences beta(n)->infinity for n->infinity, such that Xi(n,t,beta(n)) has real roots only for all n, and to each entire function it is possible to associate a unique minimal beta-sequence fulfilling a specific difference equation. Numerical analysis indicates that the minimal beta(n) sequence associated with the Riemann Xi(t) has a distinct sub-logarithmic growth rate, and it can be shown that the approximant Xi(n,t,beta(n)) converges to Xi(t) when n->infinity if beta(n)=o(log (n)). Invoking the Hurwitz theorem of complex analysis, and applying a formal analysis of the asymptotic properties of minimal beta-sequences, a fundamental mechanism is identified which provides a compelling confirmation of the validity of the Riemann Hypothesis.
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