On the Fourth Power Moment of Fourier Coefficients of Cusp Form

Jinjiang Li, Panwang Wang, Min Zhang

Let $a(n)$ be the Fourier coefficients of a holomorphic cusp form of weight $\kappa =2n⩾12$ for the full modular group and $A(x)=\sum _{n⩽x}a(n)$. In this paper, w…