template<typename T> 
struct rms_coefficients<T, 27> {
  // types
  typedef std::tr1::array< T, 14 >    value_type;
  typedef std::tr1::array< bool, 13 > flags_type;

  // public static functions
  static const value_type & weights() ;
  static const value_type & abcissa() ;
  static const flags_type & crossed_flags() ;
  static const flags_type & bisected_flags() ;
};