带两条悬挂边的回路是优美图
Cycles with two pendent edges are graceful graphs
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摘要: 研究一个回路任意增加两条悬挂边所得到的图 ,证明了这类图都是优美图 .Abstract: A cycle with two pendent edges is obtained from cycle,by adding two pendent edges.In this paper,it is proved that all cycles with two pendent edges are graceful graphs.