20 #include "matrix_form.cc" 
   28   template class tensor::MatrixForm<cdouble>;
 
   30   const MatrixForm<cdouble> matrix_form(
const Tensor<cdouble> &t)
 
   32     return MatrixForm<cdouble>(t);
 
   35   template std::ostream &operator<< <cdouble>(std::ostream &s, 
const MatrixForm<cdouble> &m);