Reorder Gamma function special cases

Author: mavam

stat-cookbook.tex

@@ -2424,8 +2424,8 @@ \subsection{Gamma Function}
     $\displaystyle\gamma(s,x) = \int_0^x t^{s-1} e^{-t}dt$
   \item $\Gamma(\alpha + 1) = \alpha \Gamma(\alpha) \qquad \alpha>1$
   \item $\Gamma(n) = (n-1)! \qquad n \in \mathbb N$
-  \item $\Gamma(1/2) = \sqrt{\pi}$
   \item $\Gamma(0) = \Gamma(-1) = \infty$
+  \item $\Gamma(1/2) = \sqrt{\pi}$
   \item $\Gamma(-1/2) = -2 \Gamma(1/2)$
 \end{itemize}