The
catanh()
function calculates the complex arc hyperbolic tangent of
z.
If y = catanh(z), then z = ctanh(y).
The imaginary part of
y
is chosen in the interval [-pi/2,pi/2].
One has:
catanh(z) = 0.5 * clog((1 + z) / (1 - z))
VERSIONS
These functions first appeared in glibc in version 2.1.
This page is part of release 3.14 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
