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

Amrinder Kaur

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 $j\ge 2$, let ${\lambda }_{sy{m}^{j}f}(m)$ den…