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arXiv 2602.06304math.NT
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Hurwitz和Barnes多重ζ函数的均值及上界

Mean values and upper bounds for the Hurwitz and Barnes multiple zeta functions

Onomichi City University(尾道市立大学)

Takashi Miyagawa

AI总结:

本文研究Hurwitz型和Barnes型多重ζ函数的均值平方值,通过线性组合经典Hurwitzζ函数的方法,建立参数σ的渐进行为和上界,揭示Barnes型参数向量的算术结构对均值平方值的影响。

摘要:

由于其与黎曼ζ函数的深刻联系,多重ζ函数的均值渐进行为引起了广泛关注。本文研究了Hurwitz型和Barnes型多重ζ函数的均值平方值。对于Hurwitz型多重ζ函数,我们建立了其均值平方值关于参数σ的渐进行为和上界,我们的方法基于Hurwitz型多重ζ函数可以表示为经典Hurwitzζ函数的线性组合,这使我们能够直接应用后者均值的已知结果。对于Barnes型多重ζ函数,我们表明均值平方值的行为本质上依赖于参数向量的算术结构。在参数在有理数域上线性相关的状况下,我们获得了类似于Hurwitz型情况的渐进行式。相反,对于一般参数,我们从函数本身的界导出了均值平方值的上界。特别地,我们澄清了Barnesζ函数参数所张成的有理数向量空间的维度如何影响均值平方值的阶数。

英文摘要:

Due to their deep connection with the Riemann zeta function, the asymptotic behavior of mean values of multiple zeta functions has attracted considerable attention. In this paper, we study the mean square values of Hurwitz-type and Barnes-type multiple zeta functions. For the Hurwitz-type multiple zeta function, we establish asymptotic formulas and upper bounds for its mean square values in terms of the parameter $σ$. Our approach relies on the fact that Hurwitz-type multiple zeta functions can be expressed as linear combinations of the classical Hurwitz zeta function, which allows us to apply known results on the mean values of the latter almost directly. For the Barnes-type multiple zeta function, we show that the behavior of the mean square values depends essentially on the arithmetic structure of the parameter vector. In the case where the parameters are linearly dependent over $\Q$, we obtain asymptotic formulas analogous to the Hurwitz-type case. In contrast, for general parameters, we derive upper bounds for the mean square values from bounds for the function itself. In particular, we clarify how the order of the mean square values varies in terms of the dimension of the $\Q$-vector space spanned by the parameters of the Barnes zeta function.

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