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diff --git a/src/elementaryFunctions/atanh/zatanhs.c b/src/elementaryFunctions/atanh/zatanhs.c
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-/*
- * Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
- * Copyright (C) 2006-2008 - INRIA - Bruno JOFRET
- *
- * 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
- *
- */
-
-/*
-// METHOD
-// based on the formula atanh(z) = i atan(-i z)
-*/
-
-#include "atanh.h"
-#include "atan.h"
-
-doubleComplex zatanhs(doubleComplex z) {
- doubleComplex minus_i_z = DoubleComplex(zimags(z), -zreals(z));
- doubleComplex atan_minus_i_z = zatans(minus_i_z);
- return DoubleComplex(-zimags(atan_minus_i_z), zreals(atan_minus_i_z));
-}