mars.tensor.special.erfcinv

mars.tensor.special.erfcinv(x, out=None, where=None, **kwargs)

Inverse of the complementary error function.

Computes the inverse of the complementary error function.

In the complex domain, there is no unique complex number w satisfying erfc(w)=z. This indicates a true inverse function would have multi-value. When the domain restricts to the real, 0 < x < 2, there is a unique real number satisfying erfc(erfcinv(x)) = erfcinv(erfc(x)).

It is related to inverse of the error function by erfcinv(1-x) = erfinv(x)

Parameters

y (ndarray) – Argument at which to evaluate. Domain: [0, 2]

Returns

erfcinv – The inverse of erfc of y, element-wise

Return type

ndarray

See also

erf

Error function of a complex argument

erfc

Complementary error function, 1 - erf(x)

erfinv

Inverse of the error function