where .
Poincaré-Fuchs-Klein Automorphic Function
See also
Automorphic FunctionExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Poincaré-Fuchs-Klein Automorphic Function." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Poincare-Fuchs-KleinAutomorphicFunction.html