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Rényi Intézet, Tondós terem
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Description
We prove that the supnorm of an $L^2$-normalised holomorphic Siegel cusp form of weight $k$, which is a Maass lift of a Hecke eigenform on $\mathrm{SL}_2(\mathbb{Z})$, is bounded by $k^{17/12+\varepsilon}$ up to a constant depending only on $\varepsilon$. This provides an alternative approach to the same problem treated by Valentin Blomer.