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
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
projects to z
itself. Every complex infinite value is
projected to a single infinite value, namely to positive infinity on the real
These functions first appeared in glibc in version 2.1.
For an explanation of the terms used in this section, see attributes(7)
|cproj (), cprojf (), cprojl ()
C99, POSIX.1-2001, POSIX.1-2008.
In glibc 2.11 and earlier, the implementation does something different (a
projection onto a Riemann Sphere).
This page is part of release 4.10 of the Linux man-pages
description of the project, information about reporting bugs, and the latest
version of this page, can be found at