Man page - cproj(3)

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Manual

cproj

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
ATTRIBUTES
STANDARDS
HISTORY
SEE ALSO

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 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).

Image grohtml-372563-1.png

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)