SpecFunc_RegularizedIncompleteGammaInverse

SpecFunc_RegularizedIncompleteGammaInverse(a, x, tail=False)

Inverse of the regularized incomplete Gamma function.

\forall x \in \Rset, \quad RegularizedIncompleteGammaInverse(a, x) = \mathrm{P}^{-1}(a, x)

Parameters
afloat \in \Rset^*_+
xfloat \in [0, 1]
tailbool, optional

By default, tail is False.

Returns
resultfloat

  • If tail is False: result = \mathrm{P}^{-1}(a, x).

  • If tail is True: result = \mathrm{P}^{-1}(a, 1-x).

See also

SpecFunc_Gamma, SpecFunc_RegularizedIncompleteGamma