| 树的拓扑指标Z_1(G) |
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| 引用本文： | 刘锋. 树的拓扑指标Z_1(G)[J]. 高师理科学刊, 2007, 27(5): 11-15 |
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| 作者姓名： | 刘锋 |
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| 作者单位： | 青海师范大学,数学系,青海,西宁,810008 |
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| 摘 要： | 分子图的拓扑指标Z1(G)是反映分子物理和化学性质的重要拓扑指标,在n个顶点的树中具有最大Z1(G)和最小Z1(G)的树的基础上确定了n个顶点的树中具有次大,第三大及第四大Z1(G)的树.
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| 关 键 词： | 拓扑指标Z_1(G) 树 度序列 直径 |
| 文章编号： | 1007-9831（2007）05-0011-05 |
| 收稿时间： | 2007-03-24 |
The result of the topological indices Z1(G) of trees |
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| LIU Feng. The result of the topological indices Z1(G) of trees[J]. Journal of Science of Teachers＇College and University, 2007, 27(5): 11-15 |
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| Authors: | LIU Feng |
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| Affiliation: | Department of Mathematics, Qinghai Normal University, Xining 810008, China |
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| Abstract: | Topological indicesZ1(G) can reflex chemical and physical properties of molecules graphs.The trees withnvertices that have minimal or maximal value of the topological indexZ1(G) are found.Based on the above,determined the trees which have the second,third,and fourth largest value ofZ1(G) among all the trees with n vertices. |
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| Keywords: | topological indicesZ1(G) tree degree sequence diameter |
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