从图G的补图谱半径角度研究图的泛圈性.利用图的补图谱半径的界,讨论泛圈图存在的谱条件,证明了n阶图G,如果μ（G）≤（n-3）（1/2）,则图G是泛圈图.%In this paper, some spectral conditions we studied pancyclic of a graph from the spectral radius of a graph G. for the existence of pancyclic graph by using bounds on spectral We discussed radius of the complement of a graph, and show that if G was a graph of order n withμ（G）≤（n-3）（1/2）, then G was a pancyclic graph.
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