erf man page on Ultrix

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erf(3m)								       erf(3m)

Name
       erf, erfc - error function and complementary error function

Syntax
       #include <math.h>

       double erf (x)
       double x;

       double erfc (x)
       double x;

Description
       NOTE:  Your  terminal may not be able to accurately display the special
       math symbols in this reference page. See the ULTRIX  Programmer's  Man‐
       ual, Unsupported for a complete description of the math symbols.
								   x
       The function returns the error function of x, defined as ___∫e−t2dt.
								\│π0
       The  function,  which  returns 1.0 - erf(x), 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 (e.g. for x = 5, 12 places are lost).

See Also
       exp(3m)
       ULTRIX Programmer's Manual, Unsupported

				      VAX			       erf(3m)
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