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arXiv 1810.06002math.NTmath.PR
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$\mathbb{F}_q[T]$ 中短区间内两平方数和个数的方差

The variance of the number of sums of two squares in $\mathbb{F}_q[T]$ in short intervals

Ofir Gorodetsky, Brad Rodgers

AI总结:

本文在 $\mathbb{F}_q[T]$ 中大 $q$ 极限下解决了短区间内两平方数和计数的方差估计问题,揭示了其与 $z$-测度的联系,并基于此提出了与数值数据高度吻合的整数环境猜想。

摘要:

考虑短区间内可表示为两平方数和的整数个数。在随机短区间上,这些计数的方差估计是什么?我们在大 $q$ 极限下解决了该问题的函数域变体,发现其与在无限对称群上调和分析背景下首次研究的 $z$-测度存在联系。对于除数函数 $d_z(n)$ 的短区间求和,也建立了与 $z$-测度的类似联系。我们利用这些结果在整数环境中提出猜想,该猜想与数值生成的数据高度吻合。我们的证明依赖于 N. Katz 和 W. Sawin 的等分布结果。

英文摘要:

Consider the number of integers in a short interval that can be represented as a sum of two squares. What is an estimate for the variance of these counts over random short intervals? We resolve a function field variant of this problem in the large $q$ limit, finding a connection to the $z$-measures first investigated in the context of harmonic analysis on the infinite symmetric group. A similar connection to $z$-measures is established for sums over short intervals of the divisor functions $d_z(n)$. We use these results to make conjectures in the setting of the integers which match very well with numerically produced data. Our proofs depend on equidistribution results of N. Katz and W. Sawin.

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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