The catanh() function
calculates the complex atanh(3). 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)).
This page is part of release 2.70 of the Linux
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bugs, can be found at
http://www.kernel.org/doc/man-pages/.
Copyright 2002 Walter Harms (walter.harmsinformatik.uni-oldenburg.de)
Distributed under GPL