Analytic twists of GL3 × GL2 automorphic forms
Analytic twists of GL3 × GL2 automorphic forms
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GL3 × GL2 自守形式的解析扭曲
DOI:
10.1093/imrn/rnaa348
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发表时间:
2021
影响因子:
1
通讯作者:
Qingfeng Sun
中科院分区:
文献类型:
--
作者:
Yongxiao Lin;Qingfeng Sun
Letbe a Hecke–Maass cusp form forwith normalized Hecke eigenvalues. Letbe a holomorphic or Maass cusp form forwith normalized Hecke eigenvalues. In this paper, we are concerned with obtaining nontrivial estimates for the sum $$\begin{align*}& \sum_{r,n\geq 1}\lambda_{\pi}(n,r)\lambda_f(n)e\left(t\,\varphi(r^2n/N)\right)V\left(r^2n/N\right), \end{align*}$$where,,is a large parameter andis some real-valued smooth function. As applications, we give an improved subconvexity bound for-functions in the-aspect and under the Ramanujan--Petersson conjecture we derive the following bound for sums ofFourier coefficients $$\begin{align*}& \sum_{r^2n\leq x}\lambda_{\pi}(r,n)\lambda_f(n)\ll_{\pi, f, \varepsilon} x^{5/7-1/364+\varepsilon} \end{align*}$$for any, which breaks for the 1st time the barrierin a work by Friedlander–Iwaniec.