osf1 man page for erf

erf(3)							     Library Functions Manual							    erf(3)

NAME
       erf, erfc - Error functions

LIBRARY
       Math Library (libm.a)

SYNOPSIS
       #include <math.h>

       double  erf    (double  x);  float  erff  (float  x); long double erfl	(long double x); double erfc  (double x); float  erfcf (float  x);
       long double erfcl  (long double x);

STANDARDS
       Interfaces documented on this reference page conform to industry standards as follows:

       erf():  XPG4

       erfc():	XPG4

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

DESCRIPTION
       The erf(), erff(), and erfl() functions return the error function of x, where erf(x), erff(x), and erfl(x)  equal  (2/sqrt(pi))	times  the
       area under the curve e**(-t**2) between 0 and x.

       The  erfc(), erfcf(),  and erfcl() functions return (1.0 - erf(x)).  The erfc() function can result in an underflow as x gets large.  delim
       off

																	    erf(3)