I heard that the space of Maass cusp newforms on $\Gamma_0(N)/\mathbb{H}$ has a basis of Hecke eigenforms.
Would anyone happen to know of a reference of this fact? Or, even better, how to prove it?
2026-03-25 09:26:17.1774430777
A Hecke-Maass eigenbasis for the space of Maass cusp newforms
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