基于图邻接矩阵特征值和特征向量的两个新拓扑指数
Two new topological indices based on graph adjacency matrix eigenvalues and eigenvectors
摘要:
基于邻接矩阵特征值的Estrada拓扑指数EE是共谱图的退化拓扑指数.通过引入特征向量,设计了两个新的拓扑指数(RV_a和RV_b),它们降低了烷烃或循环图的退化性。RV_a指数与EE指数在8 ~ 10个碳原子烷烃的排序上相似,而RV_b指数与Balaban指数J(平均距离连接性)更相似。这四个拓扑指数之间的相互关系进行了讨论,指出哪些因素具有主导性的影响。
英文摘要:
The Estrada topological index EE, based on the eigenvalues of the adjacency matrix, is degenerate for cospectral graphs. By additionally considering the eigenvectors, two new topological indices are devised (RV_a and RV_b), which have reduced degeneracy for alkanes or cyclic graphs. Index RV_a shows similarity to EE in ordering of alkanes with 8 to 10 carbon atoms, whereas index RV_b is more similar to the average distance-based connectivity (Balaban index J). Inter-correlations between these four topological indices are discussed, indicating which factors have predominant influence.
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