摘要
令(n,△)是具有n个顶点,最大度为△的树的全体.1,△(n)是具有n个顶点且每个顶点的度是1或△的树的全体.对于任意λ≠0,本文分别在(n,△)和1,△(n)中确定了具有最大的λ-修改的Wiener指数的极值图.
Let (n, △) be the set of all the trees of order n and with maximum degree, and 1.△(n) be the set of all the trees of order n, whose vertices are of degree 1 or △. In this paper, for each λ≠ 0, we determine the extremal graphs in (n,△) and 1.△(n) with maximal A-modified Wiener indices respectively.
出处
《西南民族大学学报(自然科学版)》
CAS
2009年第2期241-243,共3页
Journal of Southwest Minzu University(Natural Science Edition)
基金
丽水学院青年基金资助项目(QN08003)