λ1=λ2\lambda_{1}=\lambda_{2}λ1=λ2
λ1>λ2\lambda_{1}>\lambda_{2}λ1>λ2
λ1<λ2\lambda_{1}<\lambda_{2}λ1<λ2
λ1=1/λ2\lambda_{1}=1/ \lambda_{2}λ1=1/λ2