奇状放射树的优美性

The gracefulness of trees with odd - number radiant type

给出了树的顶点坐标及树的坐标，使得每一棵给定的树都有了确定的解析表示式，定义了一种奇状放射树，并利用移边定理讨论其优美性．

People have still not established a complete system to describe the structure of tree and graph by now. Graph still has not a systematic classification about its structure. Thus a number of problems which are similar to 'A. Rosa's conjecture' have not been solved by now. This paper uses the method of analysis to describe the structure of tree, namely, estab- lishes the coordinate of tree and its vertex. Using the coordinate of tree, a kind of TONRT is defined and its gracefulness is studied by using edge - moving theorem.