摘要
归纳总结了优美树研究的几种常见方法，给出了基变换定理。
This paper sums up some general methods for the study of graceful trees and gives up “the theorem of base-changing”. It is useful to study the grace-fulness of trees and to prove “Rosa's conjecture that every tree is graceful”
出处
《东北师大学报（自然科学版）》
CAS
CSCD
1999年第2期21-26,共6页
Journal of Northeast Normal University(Natural Science Edition)
关键词
优美树
标号共轭点
Rosa猜想
树
优美性
gracefultrees
conjugate vertices under labelling
base vertex
Joint sum
rodical product
alternate trees (alternate-labelled graceful trees)
branch
