erfw man page on HP-UX

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erf(3M)								       erf(3M)

NAME
       erf(),  erff(),	erfl(),	 erfw(),  erfq(),  erfc(),  erfcf(),  erfcl(),
       erfcw(), erfcq() - error function and complementary error functions

SYNOPSIS
   HP Integrity Server Only
DESCRIPTION
       returns the error function of x, defined as:

       returns the complementary value, 1.0 − It prevents the extreme loss  of
       relative	 accuracy  if  is  called for a large x and the result is sub‐
       tracted from 1.0.  (For example, for x = 5, twelve decimal  places  are
       lost.)

   Integrity Server Only
       and are versions of and respectively; they take a argument and return a
       result.

       and are versions of and respectively; they take a argument and return a
       result.

       and  are versions of and respectively; they take an argument and return
       an result.

       and are equivalent to and respectively on HP-UX systems.

USAGE
       To use these functions compile either with the default option  or  with
       the and options.

       To use (for Integrity servers) or compile also with the option.

       To use any of these functions, make sure your program includes and link
       in the math library by specifying on the	 compiler  or  linker  command
       line.

       For more information, see the at the following site:

RETURN VALUE
       If x is +INFINITY, returns 1.0.

       If x is −INFINITY, returns −1.0.

       If x is +INFINITY, returns zero.

       If x is −INFINITY, returns 2.0.

       Whether and raise the inexact exception is unspecified.

       If x is NaN, and return NaN.

ERRORS
       No errors are defined.

SEE ALSO
       exp(3M), pow(3M), sqrt(3M), math(5).

STANDARDS CONFORMANCE
       :  SVID3, XPG4.2, ISO/IEC C99 (including Annex F, ``IEC 60559 floating-
       point arithmetic'')

       : ISO/IEC C99 (including Annex F,  ``IEC	 60559	floating-point	arith‐
       metic'')

								       erf(3M)
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