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arXiv 2402.07473math.NT
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实Dirichlet $L$-函数的矩与多重Dirichlet级数

Moments of real Dirichlet $L$-functions and multiple Dirichlet series

Charles University, Faculty of Mathematics and Physics(查理大学数学物理学院)

Martin Čech

AI总结:

本文研究实Dirichlet $L$-函数$k$次矩相关的多重Dirichlet级数,证明其亚纯延拓性($k\boldsymbol{\rm g}5$依赖广义Lindelöf假设),得到前三个矩的渐近公式并重现已有结果,方法简洁且直接符合配方预测。

摘要:

我们研究了与实Dirichlet $L$-函数的$k$次矩相关的多重Dirichlet级数,并证明其可亚纯延拓至$\boldsymbol{\rm C}^{k+1}$中的特定区域,该结果在$k\boldsymbol{\rm g}5$时以广义Lindelöf假设为条件。作为推论,我们得到了前三个矩带幂节省误差项的渐近公式,并在相关问题中对任意$k$(在广义Lindelöf假设下)检测到0-交换和1-交换项,重现了Conrey和Rodgers关于长Dirichlet多项式的最新结果。我们方法的优势在于其简洁性,无需修改多重Dirichlet级数即可获得其亚纯延拓,因此能直接得到与Conrey、Farmer、Keating、Rubinstein和Snaith的配方预测形式一致的渐近公式。

英文摘要:

We consider the multiple Dirichlet series associated to the $k$th moment of real Dirichlet $L$-functions, and prove that it has a meromorphic continuation to a specific region in $\mathbb{C}^{k+1}$, which is conditional under the generalized Lindelöf hypothesis for $k\geq 5$. As a corollary, we obtain asymptotic formulas for the first three moments with a power-saving error term, and detect the 0- and 1-swap terms in related problems for any $k$ (conditionally under the Generalized Lindelöf Hypothesis), recovering the recent results of Conrey and Rodgers on long Dirichlet polynomials. The advantage of our method is its simplicity, since we don't need to modify the multiple Dirichlet series to obtain its meromorphic continuation. As a result, we obtain the asymptotic formulas directly in the form as they appear in the recipe predictions of Conrey, Farmer, Keating, Rubinstein and Snaith.

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