clog
, clogf
,
clogl
—
complex natural logarithm functions
#include <complex.h>
double complex
clog
(double
complex z);
float complex
clogf
(float
complex z);
long double complex
clogl
(long
double complex z);
These functions compute the complex natural (base e) logarithm of
z, with a branch cut along the negative real axis.
These functions return the complex natural logarithm value, in the range of a
strip mathematically unbounded along the real axis and in the interval [-i
pi, +i pi] along the imaginary axis.
cexp(3), IEEE Std
1003.1-2001 (“POSIX.1”)
⟨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 .