图C5的(r1,r2,r3,0,0)-冠简记为C5(r1,r2,r3,0,0),St(m)表示有m+1个顶点或有m条边的星型树.讨论了C5(r1,r2,r3,0,0)与St(m)的非连通并集C5(r1,r2,r3,0,0)∪St(m)优美性,用构造性的方法给出了一些特殊的C5(r1,r2,r3,0,0)∪St(m)的优美标号.
The gracefulness of the graph C5(r1,r2,r3,0,0)∪St(m) is discussed.The graceful labelings are given.It also proves that some special graph C5(r1,r2,r3,0,0)∪St(m) is graceful graph.