Genus zero discrete groups $Γ$ such that $Γ_{0} (N) \subseteq Γ \subseteq Γ_{0} (N)^{+}$ (compiled by M.-L. Lang)

$Genus zero discrete groups $\Gamma$ such that $\Gamma_0(N)\subseteq\Gamma\subseteq\Gamma_0(N)^+$ (compiled by M.-L. Lang) cover$

A subscription is required to access this book chapter.