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arXiv 2108.01040math.NTmath.DS
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高秩I中θ和的界

Bounds for theta sums in higher rank I

Jens Marklof, Matthew Welsh

摘要:

θ和是在振荡阶段具有二次型的有限指数和。本文在光滑截断和盒截断情形下建立了θ和的新的上界。这推广了Fiedler,Jurkat和Körner在1977年对单变量θ和的经典结果,并且在多变量情况下,改进了Cosentino和Flaminio在2015年获得的先前估计。在我们的方法中的关键步骤是自守表示的θ函数和它们的增长的尖点的基础齐性空间。

英文摘要:

Theta sums are finite exponential sums with a quadratic form in the oscillatory phase. This paper establishes new upper bounds for theta sums in the case of smooth and box truncations. This generalises a classic 1977 result of Fiedler, Jurkat and Körner for one-variable theta sums and, in the multi-variable case, improves previous estimates obtained by Cosentino and Flaminio in 2015. Key steps in our approach are the automorphic representation of theta functions and their growth in the cusps of the underlying homogeneous space.

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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