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arXiv 1504.07804math.NT
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$F_{q}[t]$中除数函数的和与矩阵积分

Sums of divisor functions in $F_{q}[t]$ and matrix integrals

Jon Keating, Brad Rodgers, Edva Roditty-Gershon, Zeev Rudnick

摘要:

研究了有限$q$元域上有理函数域的$k$次除数函数$d_k(n)$在短区间上的和的均方以及等差数列.在极限为$q\rightarrow\infty$的情况下,我们建立了与酉群上矩阵积分的关系.计算该积分使我们能够计算格点计数方面的$d_k(n)$的总和的均方。这个晶格点计数可以反过来用我们分析的某些多项式来计算。我们的结果为整数上相应的经典问题提供了一般性的证明,这与已知答案的少数情况一致。

英文摘要:

We study the mean square of sums of the $k$th divisor function $d_k(n)$ over short intervals and arithmetic progressions for the rational function field over a finite field of $q$ elements. In the limit as $q\rightarrow\infty$ we establish a relationship with a matrix integral over the unitary group. Evaluating this integral enables us to compute the mean square of the sums of $d_k(n)$ in terms of a lattice point count. This lattice point count can in turn be calculated in terms of certain polynomials, which we analyse. Our results suggest general conjectures for the corresponding classical problems over the integers, which agree with the few cases where the answer is known.

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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