//  (C) Copyright John Maddock 2005.

 //  Use, modification and distribution are subject to the

 //  Boost Software License, Version 1.0. (See accompanying file

 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

 #ifndef BOOST_MATH_COMPLEX_ASINH_INCLUDED

 #define BOOST_MATH_COMPLEX_ASINH_INCLUDED

 #ifndef BOOST_MATH_COMPLEX_DETAILS_INCLUDED

 #  include <boost/math/complex/details.hpp>

 #endif

 #ifndef BOOST_MATH_COMPLEX_ASINH_INCLUDED

 #  include <boost/math/complex/asinh.hpp>

 #endif

 namespace boost{ namespace math{

 template<class T> 

 inline std::complex<T> asinh(const std::complex<T>& x)

 {

    //

    // We use asinh(z) = i asin(-i z);

    // Note that C99 defines this the other way around (which is

    // to say asin is specified in terms of asinh), this is consistent

    // with C99 though:

    //

    return ::boost::math::detail::mult_i(::boost::math::asin(::boost::math::detail::mult_minus_i(x)));

 }

 } } // namespaces

 #endif // BOOST_MATH_COMPLEX_ASINH_INCLUDED