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double erf(x) double x;
double erfc(x) double x;
erf(x) returns the error function of x; where erf(x):= (2/\(sr\(*p)\(is0xexp.-t
erfc(x) returns 1.0-erf(x), computed however by other methods that avoid cancellation for large x.
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Created by unroff & hp-tools. © somebody (See intro for details). All Rights Reserved. Last modified 11/5/97