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arXiv · 2502.15207

Sign changes in Fourier coefficients of the symmetric power $L$-functions on sums of two squares

Amrinder Kaur
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Abstract

Let $f$ be a normalized primitive Hecke eigen cusp form of even integral weight $k$ for the full modular group $SL(2,\mathbb{Z})$. For integers $j \geq 2$, let $\lambda_{sym^j f}(m)$ denote the $m$th Fourier coefficient of the $j$th symmetric power $L$-function associated with $f$. We give a quantitative result on the number of sign changes of $\lambda_{sym^j f}(m)$ for the indices $m$ that are the sum of two squares in the interval $[1,x]$ for sufficiently large $x$.

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Amrinder Kaur. 2025-02-21. Sign changes in Fourier coefficients of the symmetric power $L$-functions on sums of two squares. https://arxiv.org/abs/2502.15207

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