Schwarz's map for Appell's second hypergeometric system with quarter integer parameters

Keiji Matsumoto, Shohei Osafune, Tomohide Terasoma

We study Schwarz's map for Appell's second system $\cF_2$ of hypergeometric differential equations in two variables with parameters $a=c_1=c_2=\frac{1}{2}$, $b_1=b_2=\frac{1}{4}$.…