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Uniform subconvex bounds for Rankin-Selberg $L$-functions (2110.08682v1)
Published 16 Oct 2021 in math.NT
Abstract: Let $f$ be a Maass cusp form for $\rm SL_2(\mathbb{Z})$ with Laplace eigenvalue $1/4+\mu_f2$, $\mu_f>0$. Let $g$ be an arbitrary but fixed holomorphic or Maass cusp form for $\rm SL_2(\mathbb{Z})$. In this paper, we establish the following uniform subconvexity bound for the Rankin-Selberg $L$-function $L(s,f\otimes g)$ $$ L\left(1/2+it,f\otimes g\right)\ll (\mu_f+|t|){9/10+\varepsilon}, $$ where the implied constant depends only on $\varepsilon$ and $g$.