Name

cproj, cprojf, cprojl — project into Riemann Sphere

Synopsis

#include <complex.h>
double complex cproj( double complex   z);
float complex cprojf( float complex   z);
long double complex cprojl( long double complex   z);
[Note] Note

Link with −lm.

DESCRIPTION

This function projects 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.

CONFORMING TO

C99

NOTES

The glibc implementation is broken and does something entirely different.

SEE ALSO

cabs(3), complex(7)


  Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
Distributed under GPL