trusty (3) clogl.3posix.gz

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NAME
       clog, clogf, clogl - complex natural logarithm functions


SYNOPSIS
       #include <complex.h>

       double complex clog(double complex z);
       float complex clogf(float complex z);
       long double complex clogl(long double complex z);


DESCRIPTION
       These  functions  shall  compute the complex natural (base e) logarithm of z, with a branch cut along the
       negative real axis.


RETURN VALUE
       These functions shall return the complex natural logarithm value, in the range of a strip  mathematically
       unbounded along the real axis and in the interval [-ipi, +ipi] along the imaginary axis.


ERRORS
       No errors are defined.

       The following sections are informative.


EXAMPLES
       None.


APPLICATION USAGE
       None.


RATIONALE
       None.


FUTURE DIRECTIONS
       None.


SEE ALSO
       cexp() , the Base Definitions volume of IEEE Std 1003.1-2001, <complex.h>


       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 .