1 .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
3 .\" %%%LICENSE_START(GPL_NOVERSION_ONELINE)
4 .\" Distributed under GPL
7 .TH CPROJ 3 2015-04-19 "" "Linux Programmer's Manual"
9 cproj, cprojf, cprojl \- project into Riemann Sphere
11 .B #include <complex.h>
13 .BI "double complex cproj(double complex " z ");"
15 .BI "float complex cprojf(float complex " z ");"
17 .BI "long double complex cprojl(long double complex " z ");"
21 These functions project a point in the plane onto the surface of a
22 Riemann Sphere, the one-point compactification of the complex plane.
28 Every complex infinite value is projected to a single infinite value,
29 namely to positive infinity on the real axis.
31 These functions first appeared in glibc in version 2.1.
33 For an explanation of the terms used in this section, see
39 Interface Attribute Value
44 T} Thread safety MT-Safe
47 C99, POSIX.1-2001, POSIX.1-2008.
49 In glibc 2.11 and earlier, the implementation does something different
52 projection onto a Riemann Sphere).
53 .\" http://sources.redhat.com/bugzilla/show_bug.cgi?id=10401