Noncongruence subgroups and Maass waveforms
(2018)
Journal Article
The main topic of the paper is spectral theory for noncongruence subgroups of the modular group. We have studied a selection of the main conjectures in the area: the Roelcke–Selberg and Phillips–Sarnak conjectures and Selberg's conjecture on exceptio... Read More about Noncongruence subgroups and Maass waveforms.