man-pages/man3/cproj.3

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.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
.\" Distributed under GPL
.\"
.TH CPROJ 3 2002-07-28 "" "Linux Programmer's Manual"
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.SH NAME
cproj, cprojf, cprojl \- project into Riemann Sphere
.SH SYNOPSIS
.B #include <complex.h>
.sp
.BI "double complex cproj(double complex " z ");"
.br
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.BI "float complex cprojf(float complex " z ");"
.br
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.BI "long double complex cprojl(long double complex " z ");"
.sp
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Link with \fI\-lm\fP.
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.SH DESCRIPTION
This function projects a point in the plane onto the surface of a
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Riemann Sphere, the one-point compactification of the complex plane.
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Each finite point
.I z
projects to
.I z
itself.
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Every complex infinite value is projected to a single infinite value,
namely to positive infinity on the real axis.
.SH "CONFORMING TO"
C99.
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.SH NOTES
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The glibc implementation is broken and does something entirely different.
.SH "SEE ALSO"
.BR cabs (3),
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.BR complex (7)