Method DeleteZeroElements

parallel/parallel_matrices.hpp:127–131

    virtual string GetInverseType () const override;

    virtual shared_ptr<BaseMatrix> DeleteZeroElements(double tol) const override
    {
      return make_shared<ParallelMatrix> (mat->DeleteZeroElements(tol),
                                          row_paralleldofs, col_paralleldofs, op);
    }
    
  };