束金龙等给出了n阶Halin图的谱半径满足不等式ρ(Gn)≤1+ n-2a+2.讨论了该不等式取得等号的充要条件，并且讨论了含有2个内点的Halin图的谱半径，得到了含有2个内点的Halin图的谱半径单调递增的结论.%The inequalityρ( Gn)≤1+ n-2 a+2 that the spectral radius of n-order Halin graphs satis-fied was obtained by Shu Jinlong. The necessary and sufficient condition of the equal sign was discussed, and the conclusion that the spectral radius of Halin graphs which contain two interior points is monotone increasing was getting.
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