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给出了一类一般线性聚亚苯基图hM的Wiener拓扑指标的递推公式,通过求解差分方程而得到了它的Wiener拓扑指标的精确表达式。最后给出了它推广到一般情形时,其图的Wiener拓扑指标的递推关系式。
The recurrence formula of Wiener topological index for a class of general linear polyphenylene graph hM is given. The exact expression of Wiener topological index is obtained by solving the difference equation. Finally, the recursion relation of the Wiener topological index of the graph is given when it is generalized.