球面上整点的平均方差界
Average variance bounds for integer points on the sphere
AI总结:
研究球面上整点投影的精细分布,考虑球冠中投影格点数量方差,证明了在对平方半径\(n\)平均后该方差的无条件上界及足够长区间平均时的相应估计,回应了Bourgain等人的猜想。
摘要:
设\(\widehat{\mathcal E}(n)\)表示\(|\mathbf{x}|^2=n\)的整点集,径向投影到单位球面上。在\(n\)的通常同余条件下,Duke证明当\(n\to\infty\)时这些点变得均匀分布。为研究其更精细尺度分布,考虑球冠中投影格点数量的方差。Bourgain、Rudnick和Sarnak猜测了该方差的渐近公式。本文证明了在对平方半径\(n\)平均后该方差的无条件上界,且在足够长区间平均时得到了相应估计。
英文摘要:
Let $\widehat{\mathcal E}(n)$ denote the set of integer points on the sphere $|\mathbf{x}|^2=n$, projected radially onto the unit sphere. Under the usual congruence conditions on $n$, Duke proved that these points become equidistributed as $n\to\infty$. To study their finer-scale distribution, we consider the variance of the number of projected lattice points contained in a spherical cap. Bourgain, Rudnick, and Sarnak conjectured an asymptotic formula for this variance. We prove an unconditional upper bound of the conjectured order of magnitude after averaging over the squared radius $n$, and we obtain a corresponding estimate for averages over sufficiently long intervals.
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。