Imported existing code

libraries/include/boost/math/common_factor.hpp

@@ -0,0 +1,16 @@
+//  Boost common_factor.hpp header file  -------------------------------------//
+
+//  (C) Copyright Daryle Walker 2001-2002.
+//  Distributed under 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)
+
+//  See http://www.boost.org for updates, documentation, and revision history. 
+
+#ifndef BOOST_MATH_COMMON_FACTOR_HPP
+#define BOOST_MATH_COMMON_FACTOR_HPP
+
+#include <boost/math/common_factor_ct.hpp>
+#include <boost/math/common_factor_rt.hpp>
+
+#endif  // BOOST_MATH_COMMON_FACTOR_HPP