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CLOG(3)                    Linux Programmer's Manual                   CLOG(3)

NAME
       clog, clogf, clogl - natural logarithm of a complex number

SYNOPSIS
       #include <complex.h>

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

       Link with -lm.

DESCRIPTION
       The  logarithm  clog()  is  the  inverse  function  of  the exponential
       cexp(3).  Thus, if y = clog(z), then z = cexp(y).  The  imaginary  part
       of y is chosen in the interval [-pi,pi].

       One has:

           clog(z) = log(cabs(z)) + I * carg(z)

       Note that z close to zero will cause an overflow.

VERSIONS
       These functions first appeared in glibc in version 2.1.

CONFORMING TO
       C99.

SEE ALSO
       cabs(3), cexp(3), clog10(3), complex(7)

COLOPHON
       This  page  is  part of release 3.25 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

                                  2008-08-11                           CLOG(3)
 

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Gedruckt am: 15.12.2017 18:45 GMT+0100 (2017-12-15T18:45:30+01:00)