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CPROJ(3)                 BSD Library Functions Manual                 CPROJ(3)

NAME
     cproj, cprojf, cprojl -- complex projection functions

SYNOPSIS
     #include <complex.h>

     double
     cproj(double complex z);

     float
     cprojf(float complex z);

     long double
     cprojl(long double complex z);

DESCRIPTION
     These functions compute a projection of z onto the Riemann sphere: z
     projects to z, except that all complex infinities (even those with one
     infinite part and one NaN part) project to positive infinity on the real
     axis.  If z has an infinite part, then cproj() shall be equivalent to:

           INFINITY + I * copysign(0.0, cimag(z))

RETURN VALUES
     These functions return the value of the projection onto the Riemann
     sphere.

ERRORS
     No errors are defined.

SEE ALSO
     carg(3), cimag(3), conj(3), creal(3), IEEE Std 1003.1-2001 (``POSIX.1'')
     <complex.h>

COPYRIGHT
     Portions of this text are reprinted and reproduced in electronic form
     from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
     -- Portable Operating System Interface (POSIX), The Open Group Base
     Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
     Electrical and Electronics Engineers, Inc and The Open Group.  In the
     event of any discrepancy between this version and the original IEEE and
     The Open Group Standard, the original IEEE and The Open Group Standard is
     the referee document.  The original Standard can be obtained online at
     http://www.opengroup.org/unix/online.html .

BSD                            December 27, 2012                           BSD

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | COPYRIGHT