redhat man page for erf

ERF(3)							     Linux Programmer's Manual							    ERF(3)

NAME
       erf, erfc - error function and complementary error function

SYNOPSIS
       #include <math.h>

       double erf(double x);

       double erfc(double x);

DESCRIPTION
       The erf() function returns the error function of x; defined as

       erf(x) = 2/sqrt(pi)* integral from 0 to x of exp(-t*t) dt

       The erfc() function returns the complementary error function of x, that is 1.0 - erf(x).

CONFORMING TO
       SVID 3, BSD 4.3

SEE ALSO
       exp(3)

BSD
								    1993-06-25								    ERF(3)