On the 4-norm of an automorphic form
Valentin Blomer
Georg-August-Universität Göttingen, Germany

Abstract
We prove the optimal upper bound where runs over an orthonormal basis of Maa{\ss} cusp forms of prime level and bounded spectral parameter.
Cite this article
Valentin Blomer, On the 4-norm of an automorphic form. J. Eur. Math. Soc. 15 (2013), no. 5, pp. 1825–1852
DOI 10.4171/JEMS/405