The modular equation of degree five can be written
Schläfli's Modular Form
See also
Modular EquationExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Schläfli's Modular Form." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/SchlaeflisModularForm.html