2004-11-03 13:51:07 +00:00
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.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
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.\" Distributed under GPL
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.\"
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2010-06-10 03:35:04 +00:00
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.TH CPROJ 3 2010-06-10 "" "Linux Programmer's Manual"
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2004-11-03 13:51:07 +00:00
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.SH NAME
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cproj, cprojf, cprojl \- project into Riemann Sphere
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.SH SYNOPSIS
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.B #include <complex.h>
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.sp
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.BI "double complex cproj(double complex " z ");"
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2004-11-11 17:28:42 +00:00
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.br
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2004-11-03 13:51:07 +00:00
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.BI "float complex cprojf(float complex " z ");"
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2004-11-11 17:28:42 +00:00
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.br
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2004-11-03 13:51:07 +00:00
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.BI "long double complex cprojl(long double complex " z ");"
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.sp
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2007-07-21 05:25:03 +00:00
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Link with \fI\-lm\fP.
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2004-11-03 13:51:07 +00:00
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.SH DESCRIPTION
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2007-04-12 22:42:49 +00:00
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This function projects a point in the plane onto the surface of a
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2004-11-03 13:51:07 +00:00
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Riemann Sphere, the one-point compactification of the complex plane.
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2007-07-09 20:25:04 +00:00
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Each finite point
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.I z
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projects to
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.I z
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itself.
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2004-11-03 13:51:07 +00:00
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Every complex infinite value is projected to a single infinite value,
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namely to positive infinity on the real axis.
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2008-08-11 17:13:47 +00:00
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.SH VERSIONS
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These functions first appeared in glibc in version 2.1.
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2004-11-03 13:51:07 +00:00
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.SH "CONFORMING TO"
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2008-07-15 13:39:17 +00:00
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C99.
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2007-05-16 02:54:18 +00:00
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.SH NOTES
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2010-06-10 03:35:04 +00:00
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In glibc 2.11 and earlier, the implementation does something different
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(a \fIstereographic\fP projection onto a Riemann Sphere).
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.\" http://sources.redhat.com/bugzilla/show_bug.cgi?id=10401
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2004-11-03 13:51:07 +00:00
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.SH "SEE ALSO"
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.BR cabs (3),
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2006-04-21 01:24:06 +00:00
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.BR complex (7)
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