            $ 0.0000$       $0.0000$    $0.00 \cdot 00^{-0}  $       $ 0.0000$              $0.0000$            $ 0.0000$       $0.0000$    $0.00 \cdot 00^{-0}  $       $0.0000 $              $0.0000$            $ 0.0000$       $0.0000$    $0.00  \cdot 00^{-0} $        $0.0000$              $0.0000$            $ 0.0000$       $0.0000$    : Space step (first column), eigenvalue error (second column), convergence order (third column), eigenfunction error in $L^\infty$ (fourth column), eigenfunction error in $L^0$ (last column)  