4叶树的Hosoya指标极值的直接证明  

The direct proof of the 4-leaf-tree with the maximal Hosoya index

作　　者：张淑敏[1] 

机构地区：[1]青海师范大学数学系,青海西宁810008

出　　处：《青海师范大学学报（自然科学版）》2011年第2期5-8,共4页Journal of Qinghai Normal University(Natural Science Edition)

摘　　要：具有r个悬挂点的树称为r叶树.文章研究了具有n个顶点的4叶树的Hosoya指标值,并用构造的方法刻画了具有最小Hosoya指标的4叶树.A Tree T is called a r-leaf-tree if T has r pendent vertices.In this paper,we research Hosoya index of 4-leaf-trees with order n and characterized the 4-leaf-trees with the maximal Hosoya index by of the construction.

关 键 词：Hosoya-指标 r叶树 极值 

分 类 号：O157.5[理学—数学]