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NAME
cproj, cprojf, cprojl - project into Riemann Sphere
LIBRARY
Math library (libm, -lm)
SYNOPSIS
bash
#include <complex.h>bash
double complex cproj(double complex \nz\n);\n
\nfloat complex cprojf(float complex \nz\n);\n
\nlong double complex cprojl(long double complex \nz\n);DESCRIPTION
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.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| cproj (), cprojf (), cprojl () | Thread safety | MT-Safe |
STANDARDS
C11, POSIX.1-2008.
HISTORY
glibc 2.1. C99, POSIX.1-2001.
In glibc 2.11 and earlier, the implementation does something different (a stereographic projection onto a Riemann Sphere).
SEE ALSO
cabs(3), complex(7)