Module spfunc::gamma

The family of the gamma function.

$$\Gamma(z)\equiv\int_{0}^{\infty}t^{z-1}e^{-t}dt\quad(\mathfrak{R}[z]>0)$$

Functions

digamma	Calculate the digamma function $\Psi(z)$, which is defined as the derivative of the natural logarithm of the gamma function.
gamma	Calculate $\Gamma(z)$.
gamma_ln	Calculate $\ln{\Gamma(z)}$.
polygamma	Calculate the polygamma function $\Psi^{(n)}(z)$, which is defined as the n-th derivative of the digamma function.