Section: Linux Programmer's Manual (3) Updated: 2008-08-11 Local index
catanh, catanhf, catanhl - complex arc tangents hyperbolic
double complex catanh(double complex z);
float complex catanhf(float complex z);
long double complex catanhl(long double complex z);
Link with -lm.
function calculates the complex arc hyperbolic tangent of
If y = catanh(z), then z = ctanh(y).
The imaginary part of
is chosen in the interval [-pi/2,pi/2].
catanh(z) = 0.5 * clog((1 + z) / (1 - z))
These functions first appeared in glibc in version 2.1.
This page is part of release 3.27 of the Linux
A description of the project,
and information about reporting bugs,
can be found at
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Time: 21:43:10 GMT, April 16, 2011