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 3.24 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/.
Copyright 2002 Walter Harms (walter.harmsinformatik.uni-oldenburg.de)
Distributed under GPL