HyperGeom_2_2¶

HyperGeom_2_2(p1, p2, q1, q2, x)¶

Hypergeometric function of type (2,2).

${}_2F_2(p_1, p_2, q_1, q_2, x) = \sum_{n=0}^{\infty} \left[ \prod_{k=0}^{n-1} \frac{(p_1 + k)(p_2 + k)}{(q_1 + k) (q_2 + k)} \right] \frac{x^n}{n!}$