Binet's Formula for Logarithm of Gamma Function/Formulation 1

Theorem
Let $z$ be a complex number with a positive real part.

Then:


 * $\displaystyle \Ln \Gamma \paren z = \paren {z - \frac 1 2} \Ln z - z + \frac 1 2 \ln 2 \pi + \int_0^\infty \paren {\frac 1 2 - \frac 1 t + \frac 1 {e^t - 1} } \frac {e^{-t z} } t \rd t$

where:
 * $\Gamma$ is the Gamma function
 * $\Ln$ is the principal branch of the complex logarithm.