clog, clogf, clogl — natural logarithm of a complex number
#include <complex.h>
double complex
clog( |
double complex z); |
float complex
clogf( |
float complex z); |
long double complex
clogl( |
long double complex z); |
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These functions calculate the complex natural logarithm of
z, with a branch cut
along the negative real axis.
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.
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
clog(), clogf(), clogl() |
Thread safety | MT-Safe |
This page is part of release 4.07 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
https://www.kernel.org/doc/man−pages/.
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Copyright 2002 Walter Harms (walter.harmsinformatik.uni-oldenburg.de) %%%LICENSE_START(GPL_NOVERSION_ONELINE) Distributed under GPL %%%LICENSE_END |