[Boost-users] Question regarding template

Hello all, why the codes below is wrong in g++ 3.4.2? an error occurs in the line: cout< #include using namespace boost::numeric::ublas; using namespace std; template <class T> class CMatrix { matrix<T>mat_; public: CMatrix(const identity_matrix<T>& m) { mat_ = m; } static CMatrix<T> eye(int size) { return identity_matrix<T>(size); } template <class T_> friend ostream& operator << (ostream& os, CMatrix& m); }; template<class T_> ostream& operator << (ostream& os, CMatrix& m) { os< error } ---------------------------------------- Thanks in advance!