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);

       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.

VERSIONS

       These functions first appeared in glibc in version 2.1.

CONFORMING TO

       C99.

NOTES

       In glibc 2.11 and earlier, the implementation does something different (a stereographic projection onto a
       Riemann Sphere).

SEE ALSO

       cabs(3), complex(7)

COLOPHON

       This page is part of release 3.54 of the Linux man-pages project.  A  description  of  the  project,  and
       information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.

                                                   2010-06-10                                           CPROJ(3)