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/*
* Copyright (C) 2000, Imperial College
*
* This file is part of the Imperial College Exact Real Arithmetic Library.
* See the copyright notice included in the distribution for conditions
* of use.
*/
#include <stdio.h>
#include "real.h"
/*
* One could do this more efficiently, but it will have to wait.
*/
Real
atanh_R(Real x)
{
Real r;
r = matrix_Int(x, 1, -1, 1, 1);
r = log_R(r);
r = div_R_Int(r, 2);
return r;
}
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