スチューデントのt分布に基づく乱数の生成

\(\normalsize Student's\ t-distribution\ t(x,\nu)\\ (1) probability\ density\\ \hspace{30px}f(x,\nu)={\large\frac{(1+\frac{x^2}{\nu})^{-\frac{\nu+1}{2}}}{\sqrt{\nu}B(\frac{1}{2},\frac{\nu}{2})}}\\ (2) lower\ cumulative\ distribution\\ \hspace{30px}P(x,\nu)={\large\int_{\small-\infty}^{\small x}}f(t,\nu)dt\\ (3) upper\ cumulative\ distribution\\ \hspace{30px}Q(x,\nu)={\large\int_{\small x}^{\small\infty}}f(t,\nu)dt\\\)