clog3
Natural logarithm of a complex number
Usage
#include <complex.h>
double complex clog(double complex z); float complex clogf(float complex z); long double complex clogl(long double complex z);
Library
Math library (libm, -lm)
Overview
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.
Attributes
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| clog(), clogf(), clogl() | Thread safety | MT-Safe |
Releases
12 releases since Debian 3.1 (Sarge); the text changed 11 times.