cproj - Man Page
project into Riemann Sphere
Math library (libm, -lm)
#include <complex.h> double complex cproj(double complex z); float complex cprojf(float complex z); long double complex cprojl(long double complex z);
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 were added in glibc 2.1.
For an explanation of the terms used in this section, see attributes(7).
|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).
The man pages cprojf(3) and cprojl(3) are aliases of cproj(3).
2022-12-15 Linux man-pages 6.03