1CPROJ(3)                   Linux Programmer's Manual                  CPROJ(3)
2
3
4

NAME

6       cproj, cprojf, cprojl - project into Riemann Sphere
7

SYNOPSIS

9       #include <complex.h>
10
11       double complex cproj(double complex z);
12       float complex cprojf(float complex z);
13       long double complex cprojl(long double complex z);
14
15       Link with -lm.
16

DESCRIPTION

18       These functions project a point in the plane onto the surface of a Rie‐
19       mann Sphere, the one-point compactification of the complex plane.  Each
20       finite  point  z projects to z itself.  Every complex infinite value is
21       projected to a single infinite value, namely to  positive  infinity  on
22       the real axis.
23

VERSIONS

25       These functions first appeared in glibc in version 2.1.
26

ATTRIBUTES

28       For   an   explanation   of   the  terms  used  in  this  section,  see
29       attributes(7).
30
31       ┌────────────────────────────┬───────────────┬─────────┐
32Interface                   Attribute     Value   
33       ├────────────────────────────┼───────────────┼─────────┤
34cproj(), cprojf(), cprojl() │ Thread safety │ MT-Safe │
35       └────────────────────────────┴───────────────┴─────────┘

CONFORMING TO

37       C99, POSIX.1-2001, POSIX.1-2008.
38

NOTES

40       In glibc 2.11 and earlier, the implementation does something  different
41       (a stereographic projection onto a Riemann Sphere).
42

SEE ALSO

44       cabs(3), complex(7)
45

COLOPHON

47       This  page  is  part of release 5.02 of the Linux man-pages project.  A
48       description of the project, information about reporting bugs,  and  the
49       latest     version     of     this    page,    can    be    found    at
50       https://www.kernel.org/doc/man-pages/.
51
52
53
54                                  2015-04-19                          CPROJ(3)
Impressum