4) exact expressions
精确表达式
1.
A value of the Wiener index for a class of linear phenylene molecular graphhM is calculated, and a linear recursive formulas is obtained, and then a exact expressions is gained by solving some difference equations of the recursions.
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。
2.
The value of the Wiener Index for a class of linear phenylene molecular graph is calculated, and the linear recursive formulas is obtained, and then the exact expressions are gained by solving some difference equations of the recursions.
文章给出了一类一般线性聚亚苯基图hQ的Wiener拓扑指标的线性递推公式,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。
5) expression elaboration
表达精细化
6) expression precision
表达式精度
补充资料:精妙
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