Table 1 First five roots of ${\mathit{R}}_{\mathbf{0}}\mathbf{(}{\mathit{\lambda }}_{\mathit{m}}\mathbf{,}\mathit{\alpha }\mathbf{)}\mathbf{=}\mathbf{0}$

α

${\mathit{\lambda }}_{\mathbf{1}}$

${\mathit{\lambda }}_{\mathbf{2}}$

${\mathit{\lambda }}_{\mathbf{3}}$

${\mathit{\lambda }}_{\mathbf{4}}$

${\mathit{\lambda }}_{\mathbf{5}}$