摘要
利用图的谱的递推关系得到一组共谱树 ;给出整树的一个充分必要条件 。
We obtain a set of co spectral trees by means of the recursive formula on characteristic polynomials of trees.We also provide a necessary and sufficient condition,from which we construct some new integral trees.
出处
《长沙铁道学院学报》
EI
CSCD
2000年第2期84-87,共4页
Journal of Changsha Railway University
关键词
图的谱
共谱树
整树
spectra of graphs
co spectral trees
integral trees
