OpenTURNS

An Open source initiative for the Treatment of Uncertainties, Risks'N Statistics

TriGamma¶

TriGamma(x)¶

TriGamma function.

$\Psi_1(x) = \frac{1}{\Gamma(x)}\frac{\mathrm{d}^2 \Gamma(x)}{\mathrm{d}x^2}$

with $\Gamma$ the Gamma function.

Parameters:

xfloat $\in \Rset^*_+$

Returns:

resultfloat

See also

SpecFunc.Gamma