# Special case of Meijer G function

I have an instance of the Meijer G function (using the definition from http://en.wikipedia.org/wiki/Meijer_G-Function, first equation there) that seems like, given its simplicity, it should be expressible in terms of another special function. The instance is: $G\left(z\Bigg|\begin{matrix}- & - \\ 0,\tfrac{1}{2},1 & -\end{matrix}\right)=\frac{1}{2\pi i}\int_{\gamma_L}ds\, z^{-s} \frac{1}{\Gamma(-s)\Gamma(\tfrac{1}{2}-s)\Gamma(1-s)}$.

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Help appreciated -- anybody? –  MarkWayne Apr 26 '12 at 4:00
May I ask where this came from? –  Guess who it is. Apr 26 '12 at 11:24
J.M.: see comment below ying's answer. –  MarkWayne May 14 '12 at 21:23