树的Zagreb指标的上界

(泉州师范学院数学与计算机科学学院,福建 泉州 362000)

Zagreb指标;; 最大度

Upper Bound of the Zagreb Index of Trees
LI Shuli

(School of Mathematical and Computer Sciences,Quanzhou Normal University,Quanzhou 362000,China)

Zagreb index; tree; maximum degree

DOI: 10.6043/j.issn.0438-0479.201801012

备注

研究树的Zagreb指标,得到了给定阶及最大度的树的第一类Zagreb 指标的上界,证明了所得到的上界优于Das等人给出的上界.

The Zagreb index of trees will be studied and an upper bound of the first Zagreb index of trees with given orders and maximum degrees will be obtained in this paper.It is also proved that this upper bound is more superior than that reported by Das et al.