mars.tensor.special.gammainccinv#

mars.tensor.special.gammainccinv(a, b, **kwargs)[source]#

Inverse of the upper incomplete gamma function with respect to x

Given an input \(y\) between 0 and 1, returns \(x\) such that \(y = Q(a, x)\). Here \(Q\) is the upper incomplete gamma function; see gammaincc. This is well-defined because the upper incomplete gamma function is monotonic as can be seen from its definition in [dlmf].

Parameters

a (array_like) – Positive parameter
y (array_like) – Argument between 0 and 1, inclusive

Returns

Values of the inverse of the upper incomplete gamma function

Return type

scalar or ndarray