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.
C99.
SEE ALSO¶
cabs(3),
cexp(3),
clog10(3),
clog2(3),
complex(7)
COLOPHON¶
This page is part of release 3.74 of the Linux
man-pages project. A
description of the project, information about reporting bugs, and the latest
version of this page, can be found at
http://www.kernel.org/doc/man-pages/.
