13.tex

{}_{p}F_{q}\left( a_{1},\ldots,a_{p};c_{1},\ldots,c_{q};z \right) = \sum_{n = 0}^{\infty}\frac{\left( a_{1} \right)_{n}\cdots\left( a_{p} \right)_{n}}{\left( c_{1} \right)_{n}\cdots\left( c_{q} \right)_{n}}\frac{z^{n}}{n!}