树的第二原子键连通指标的极值
On Extreme Values of Second Atom-bond Connectivity Index for Trees
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摘要: 第二原子键指标为研究分子的特性提供了便利，其极值问题更是研究的重点。针对第二原子键的极值问题，应用了一个新的变换，给出了树的第二原子键指标的极大(小)值的更简单的证明。通过同样的变换，得到了树的第二原子键指标的第二大和第二小值。
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关键词:
- 第二原子键连通指标 极大值 极小值 树
Abstract: The second atom-bond connectivity index can provide convenience for molecular feature and its extreme values are the focus of study.In view of the second atom-bonds extreme problems,a new trans-formation has been introduced,and then a shorter proof of maximal and minimal values of second atom-bond connectivity for trees been given.By the same transformation,trees with the second maximal and minimal values have been obtained. -
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