linux man page for cproj

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 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  infin-
       ity 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 3.27 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)