erfc(3m) [bsd man page]

ERF(3M) 																   ERF(3M)

NAME

       erf, erfc - error functions

SYNOPSIS

       #include <math.h>

       double erf(x)
       double x;

       double erfc(x)
       double x;

DESCRIPTION

       Erf(x) returns the error function of x; where

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

       Erfc(x) returns 1.0-erf(x).

       The  entry  for erfc is provided because of the extreme loss of relative accuracy if erf(x) is called for large x and the result subtracted
       from 1.	(e.g. for x = 10, 12 places are lost).

SEE ALSO

       math(3M)

4.3 Berkeley Distribution					   May 12, 1986 							   ERF(3M)

erfc(3M)						  Mathematical Library Functions						  erfc(3M)

NAME

       erfc, erfcf, erfcl - complementary error function

SYNOPSIS

       cc [ flag... ] file... -lm [ library... ]
       #include <math.h>

       double erfc(double x);

       float erfcf(float x);

       long double erfcl(long double x);

DESCRIPTION

       These function compute the complementary error function 1.0 - erf(x).

RETURN VALUES

       Upon successful completion, these functions return the value of the complementary error function.

       If x is NaN, a NaN is returned.

       If x is +-0, +1 is returned.

       If x is -Inf, +2 is returned.

       If x is +Inf, 0 is returned.

ERRORS

       No errors are defined.

USAGE

       The  erfc() function is provided because of the extreme loss of relative accuracy if erf(x) is called for large x and the result subtracted
       from 1.0.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       erf(3M), isnan(3M), math.h(3HEAD), attributes(5), standards(5)

SunOS 5.10							    1 Sep 2002								  erfc(3M)