NAME | SYNOPSIS | DESCRIPTION | VERSIONS | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON

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

NAME         top

       cproj, cprojf, cprojl - project into Riemann Sphere

SYNOPSIS         top

       #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         top

       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.

VERSIONS         top

       These functions first appeared in glibc in version 2.1.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).

       ┌────────────────────────────┬───────────────┬─────────┐
       │Interface                   Attribute     Value   │
       ├────────────────────────────┼───────────────┼─────────┤
       │cproj(), cprojf(), cprojl() │ Thread safety │ MT-Safe │
       └────────────────────────────┴───────────────┴─────────┘

CONFORMING TO         top

       C99, POSIX.1-2001, POSIX.1-2008.

NOTES         top

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

SEE ALSO         top

       cabs(3), complex(7)

COLOPHON         top

       This page is part of release 4.07 of the Linux man-pages project.  A
       description of the project, information about reporting bugs, and the
       latest version of this page, can be found at
       https://www.kernel.org/doc/man-pages/.

                                 2015-04-19                         CPROJ(3)