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An exponential sum involving Fourier coefficients of eigenforms for $$SL(2,\pmb {{\mathbb {Z}}})$$ S L ( 2 , Z )
The Ramanujan Journal ( IF 0.6 ) Pub Date : 2020-07-19 , DOI: 10.1007/s11139-020-00255-0
Ratnadeep Acharya , Saurabh Kumar Singh

Let \(\lambda _f (n)\) denote the normalized n-th Fourier coefficient of a holomorphic Hecke eigencuspform or a Hecke–Maass cusp form for the full modular group. In this paper we shall exhibit cancellations in the following sum:

$$\begin{aligned} \sum _{N<n \leqslant 2N} \lambda _f(n) \nu (n) e\left( \alpha n^{\theta }\right) , \end{aligned}$$

where \(\alpha , \ \theta \) are real numbers with \(0< \theta <1\), and \(\nu (n)\) is either \(\mu (n)\) or \(\Lambda (n)\).



中文翻译:

包含$$ SL(2,\ pmb {{\ mathbb {Z}}})$$ SL(2,Z)的特征形式的傅立叶系数的指数和

\(\ lambda _f(n)\)表示全模群的全纯Hecke本征cuspform或Hecke-Maass cusp形式的标准化n阶傅里叶系数。在本文中,我们将显示以下金额的取消:

$$ \ begin {aligned} \ sum _ {N <n \ leqslant 2N} \ lambda _f(n)\ nu(n)e \ left(\ alpha n ^ {\ theta} \ right),\ end {aligned} $$

其中\(\ alpha,\ \ theta \)是带有\(0 <\ theta <1 \)的实数,而\(\ nu(n)\)\(\ mu(n)\)\( \ Lambda(n)\)

更新日期:2020-07-20
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