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The Inverse Complementary Error Function

Calling Sequence:
erfcinv(
x)
Parameters:
x : real

Returns: real

Synopsis: This function returns the inverse of erfc(x), that is, the result of the following expression: 1- 2/sqrt $(\pi)\cdot\int_{0\ldots x} exp(-t \cdot t) dt $.

References: [11]

Examples:

> erfcinv(3);
> erfcinv(0);

See also: erf, erfc




Gaston Gonnet
1998-09-15