#включает <boost/qvm/mat_operations.hpp>include <boost/qvm/mat_operations.hpp>[ORIG_END] -->

namespace boost
{
    namespace qvm
    {
        //Only enabled if:
        //  is_mat<A>::value && is_mat<B>::value &&
        //  mat_traits<A>::rows==mat_traits<B>::rows &&
        //  mat_traits<A>::cols==mat_traits<B>::cols
        template <class A,class B>
        typename deduce_mat2<A,B,mat_traits<A>::rows,mat_traits<A>::cols>::type
        operator-( A const & a, B const & b );
    }
}