一类优美树

• 作 者: 孟凡洪 苏耘 杨继
• 机 构: Changchun Flight Academy of Air Force
• 出 处: 东北数学（英文版）
• 发表日期: 2000年3期
• 关键词: graceful tree the coordinate of tree the coordinate of tree vertex gross order o

The present paper shows the coordinates of a tree and its vertices, defines a kind of Trees with Odd-Number Radiant Type (TONRT), deals with the gracefulness of TONRT by using the edge-moving theorem, and uses graceful TONRT to construct another class of graceful trees.