Changes

*According to elementary factors, it is a special case of the double gamma function.

*According to elementary factors, it is a special case of the double gamma function.

*Formally, the Barnes G-function is defined in the following Weierstrass product form:

*Formally, the Barnes G-function is defined in the following Weierstrass product form:

<math>G(1+z)={(2\pi)}^\frac{z}{2}</math>

<math>G(1+z)={(2\pi)}^\frac{z}{2}exp(-\frac{z+z^2(1+\gamma)}{2})</math>