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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) INRIA, Serge Steer
//
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution. The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
function y = acoth(x)
if isreal(x)&abs(x)>=1 then //the result is real
y = atanh(ones(x)./x)
else
y = atanh(x)+%i*%pi/2*csgn(%i*(x-1));
end
endfunction
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