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CPROJ(3)                   Linux Programmer's Manual                  CPROJ(3)



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 compactifica-
       tion of the complex plane.  Each finite point z projects to z itself.  Every complex  infinite  value  is  pro-
       jected 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
       The glibc implementation is broken and does something entirely different.

SEE ALSO
       cabs(3), complex(7)

COLOPHON
       This  page  is part of release 3.22 of the Linux man-pages project.  A description of the project, and informa-
       tion about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



                                  2008-08-11                          CPROJ(3)