Relating Siegel cusp forms to Siegel-Maaß forms

Jürg Kramer, Antareep Mandal

In this paper we generalize a well-known isomorphism between the space of cusp forms of weight $k$ for a Fuchsian subgroup of the first kind $\Gamma \subset {\mathrm{SL}}_2(\mathbb{R})$ a…