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(7) for descriptions of the following attributes:


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

SEE ALSO

complex.h(3HEAD), carg(3M), cimag(3M), conj(3M), creal(3M),
attributes(7), standards(7)

SunOS 5.11 July 12, 2006 CPROJ(3M)