Table 4 For $\mathit{N}\mathbf{=}\mathbf{20}$ , $\mathit{m}\mathbf{=}\mathbf{10}$ and $\mathit{\theta }\mathbf{=}\mathbf{1}\mathbf{/}\mathbf{10}$ , the exact solutions ${\mathit{\lambda }}_{\mathit{k}}$ are all inside the interval $\mathbf{[}{\mathit{a}}_{\mathbf{-}}\mathbf{,}{\mathit{a}}_{\mathbf{+}}\mathbf{]}$ for different values of ε

${\mathit{\lambda }}_{\mathit{k}}$

Exact ${\mathit{\lambda }}_{\mathit{k}}$

${\mathbf{[}\mathit{a}}_{\mathbf{-}}{\mathbf{,}\mathit{a}}_{\mathbf{+}}\mathbf{]}$, ${\mathit{\epsilon }\mathbf{=}\mathbf{10}}^{\mathbf{-}\mathbf{10}}$

${\mathbf{[}\mathit{a}}_{\mathbf{-}}{\mathbf{,}\mathit{a}}_{\mathbf{+}}\mathbf{]}$, ${\mathit{\epsilon }\mathbf{=}\mathbf{10}}^{\mathbf{-}\mathbf{15}}$