Difference between revisions of "Barnes G"
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$$G(1+z)=(2\pi)^{\frac{z}{2}} \exp \left( - \dfrac{z+z^2(1+\gamma)}{2} \right) \displaystyle\prod_{k=1}^{\infty} \left\{ \left( 1+\dfrac{z}{k} \right)^k \exp \left( \dfrac{z^2}{2k}-z \right) \right\},$$ | $$G(1+z)=(2\pi)^{\frac{z}{2}} \exp \left( - \dfrac{z+z^2(1+\gamma)}{2} \right) \displaystyle\prod_{k=1}^{\infty} \left\{ \left( 1+\dfrac{z}{k} \right)^k \exp \left( \dfrac{z^2}{2k}-z \right) \right\},$$ | ||
where $\exp$ denotes the [[exponential function]] and $\gamma$ denotes the [[Euler-Mascheroni constant]]. | where $\exp$ denotes the [[exponential function]] and $\gamma$ denotes the [[Euler-Mascheroni constant]]. | ||
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| + | <div align="center"> | ||
| + | <gallery> | ||
| + | File:Barnesgplot.png|Graph of $G$. | ||
| + | File:Complexbarnesgplot.png|[[Domain coloring]] of $G$. | ||
| + | </gallery> | ||
| + | </div> | ||
=Properties= | =Properties= | ||
| − | < | + | [[Barnes G at z+1 in terms of Barnes G and gamma]]<br /> |
| − | < | + | [[Barnes G at positive integer]]<br /> |
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| − | + | =References= | |
| − | + | [http://gdz.sub.uni-goettingen.de/dms/load/img/?PID=PPN600494829_0031%7CLOG_0022 The theory of the $G$-function by E.W. Barnes] | |
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| − | + | [[Category:SpecialFunction]] | |
| − | + | [[Category:Definition]] | |
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Latest revision as of 05:48, 6 June 2016
The Barnes $G$ function is defined by the following Weierstrass factorization: $$G(1+z)=(2\pi)^{\frac{z}{2}} \exp \left( - \dfrac{z+z^2(1+\gamma)}{2} \right) \displaystyle\prod_{k=1}^{\infty} \left\{ \left( 1+\dfrac{z}{k} \right)^k \exp \left( \dfrac{z^2}{2k}-z \right) \right\},$$ where $\exp$ denotes the exponential function and $\gamma$ denotes the Euler-Mascheroni constant.
Graph of $G$.
Domain coloring of $G$.
Properties
Barnes G at z+1 in terms of Barnes G and gamma
Barnes G at positive integer
