opensolaris man page for cproj

cproj(3M)						  Mathematical Library Functions						 cproj(3M)

NAME
       cproj, cprojf, cprojl - complex projection functions

SYNOPSIS
       c99 [ flag... ] file... -lm [ library... ]
       #include <complex.h>

       double complex cproj(double complex z);

       float complex cprojf(float complex z);

       long double complex cprojl(long double complex z);

DESCRIPTION
       These functions compute a projection of z onto the Riemann sphere: z projects to z, except that all complex infinities (even those with one
       infinite part and one NaN part) project to positive infinity on the real axis. If z has an infinite part, then cproj(z) is equivalent to:

	 INFINITY + I * copysign(0.0, cimag(z))

RETURN VALUES
       These functions return the value of the projection onto the Riemann sphere.

ERRORS
       No errors are defined.

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

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

SEE ALSO
       carg(3M), cimag(3M), complex.h(3HEAD), conj(3M), creal(3M), attributes(5), standards(5)

SunOS 5.11							    12 Jul 2006 							 cproj(3M)