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I came accross with this site about Gamma function. I just want to verify, clarify, whatever you may want to call it. It says you can compute for the gamma value for a negative argument using $\Gamma(-z)=\frac{-\pi}{z\Gamma(z)\sin(\pi z)}$

Is this true for all? I thought you cant have the negative numbers as argument for the gamma function.

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    Take a look at [Euler's reflection formula](http://en.wikipedia.org/wiki/Gamma_function#General). And while you're at it, there is much more information on the gamma function at the link.2012-10-23

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