摘要
给出了两类联图Ｐ１∨（Ｐ１∨２Ｐｎ）及ｓｔ（ｎ）∨Ｔ，论证了这两类图都是优美图，由此推出一些有意义的结论。
This paper presents two kinds of join graph, P 1∨(P 1∨2P n ) and st(n)∨T .The two kinds of join graph both are graceful graph,which is proved in the paper.Therefore,some meaningful conclusions are reached.
