Linux Programmer’s Manual
cproj, cprojf, cprojl − project into Riemann Sphere
double complex cproj(double complex z);
float complex cprojf(float complex z);
long double complex cprojl(long double complex z);
Link with −lm.
This function projects a point in the plane onto the surface of a Riemann Sphere, the one-point compactifi-
cation of the complex plane. Each finite point z projects to z itself. Every complex infinite value is pro-
jected to a single infinite value, namely to positive infinity on the real axis.
These functions first appeared in glibc in version 2.1.
The glibc implementation is broken and does something entirely different.
This page is part of release 3.24 of the Linux man-pages project. A description of the project, and informa-
tion about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.