On certain Regular Polygons in Modular Network
L. J. Rogers · Proceedings of the London Mathematical Society · 1897
i.e., ^. ( a + 2/3-1, a,a+j8, 1-y, U -2 0 | f -,y ( 2 -i 3 -y , (3, (3 + y, 1-y, t, t)2! xF(4-2y, a + 2, a+£ + 2, 0(1-20* + ... , 0an equation for t in the form of a power-series. If0+y = 1, that is, if AB and CD are parallel, the powers of t are all integral.If the pentagon is regular, the equation becomes , I, I, 0 *+ ..