cproj, cprojf, cprojl - project into Riemann Sphere
#include <complex.h>
double complex cproj(double complex z);
float complex cprojf(float complex z);
long double complex cprojl(long double complex z);
Link with
-lm.
These functions project a point in the plane onto the surface of a Riemann
Sphere, the one-point compactification of the complex plane. Each finite point
z projects to
z itself. Every complex infinite value is
projected to a single infinite value, namely to positive infinity on the real
axis.
These functions first appeared in glibc in version 2.1.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| cproj (), cprojf (), cprojl () |
Thread safety |
MT-Safe |
C99, POSIX.1-2001, POSIX.1-2008.
In glibc 2.11 and earlier, the implementation does something different (a
stereographic projection onto a Riemann Sphere).
cabs(3),
complex(7)