一个特殊螺蜘蛛链的Hosoya指标的计算

A Special Spiro Spiders with Hosoya Index

Hosoya指标是化学分子图论研究中较为流行和重要的拓扑指标之一.主要研究了一个特殊螺蜘蛛链SL(n1,n2,n3)的Hosoya指标,并得到了一些重要结论:螺蜘蛛链SL(n1,n2,n3)的Hosoya指标具有极值,其中SL(n 1′,n 2′,n 3′),SL(2,2,n1+n2+n3-4)分别具有SL(n 1,n2,n3)最小、最大的Hosoya指标.

The Hosoya index is one of the popular and valuable topological indices in chemistry molecuar graphs theory.We mainly study Hosoya index of spiro spiders,and obtain some important conclusions in this paper,,have the minimal and the maximal Hosoya index in spiro spiders.