2 problems

Let $\phi$ be a Hecke–Maass form for the full modular group, let $K$ be a compact subset of the modular surface $\mathbb{X}$, let $2<p\le\infty$, and let $\epsilon>0$. Then Iwaniec…

Let $\Gamma=\operatorname{SL}_2(\mathbb{Z})$, let $\mathbb{H}$ be the upper half-plane, and let $g\in\mathcal{B}_0(\Gamma)$ be a Hecke–Maaß eigenform normalised by…