定义了“m-脚”链图(即在P2×Pn的m个顶点各粘接一条悬挂边),讨论了它的优美性,得到了6种情形下的“m-脚”链图是k-优美的二分图,并给出了相应的优美标号.
In this paper, we defined "m - foot"chain graphs, and discussed their gracefulness, obtaining the results that six kinds of "m - foot" chain graphs are k - graceful bigraphs, and we also gave their graceful labelings.