x SuSE Linux 13.1-RELEASE x
x SuSE Linux 13.1-RELEASEx
cproj(3) Library Functions Manual cproj(3)
NAME
cproj, cprojf, cprojl - project into Riemann Sphere
LIBRARY
Math library (libm, -lm)
SYNOPSIS
#include <complex.h>
double complex cproj(double complex z);
float complex cprojf(float complex z);
long double complex cprojl(long double complex z);
DESCRIPTION
These functions project a point in the plane onto the surface of a Rie-
mann 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 at-
tributes(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)
Linux man-pages 6.04 2023-03-30 cproj(3)
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