An Analogue of the Dedekind Eta Function for Hecke Groups $H(\sqrt{D})$

Debmalya Basak, Dorian Goldfeld, Winston Heap +2

Let $D\equiv 1\mathrm{mod}4$ be a fundamental discriminant of a real quadratic field. We construct an analogue of the classical Dedekind eta function for the Hecke group $H(\sqrt{D})$.…