Digamma Function

This function calculates the Digamma function. The gamma function is one of the most important special functions and is used in analysis and function theory. It is denoted by the Greek capital letter Γ (gamma).

To perform the calculation, enter the argument x. Then click the calculate button.

To read the individual values move the mouse over the graphic.

Formula for the Digamma function

The Digamma function is defined as:

\(\displaystyle ψ(x)=\frac{d}{dx}ln(Γ(x))=\frac{Γ'(x)}{Γ(x)} \)

A detailed description can be found at Wikipedia