A formula for calculating the PI index of catacondensed hexagonal systems is given from the structural parameters. Using the result, the catacondensed hexagonal ...
Let G = (V,E) be a simple connected graph with n = |V | vertices and m = |E| edges. For each edge e = (u, v) ∈ E, let mu(e|G) be the number of.
Extremal catacondensed hexagonal systems with respect to the PI index. MATCH ... PI index of some simple pericondensed hexagonal systems. Ars Combin., 92 ...
In a pericondensed hexagonal system there exist three hexagons share a ... the maximum PI index among all the catacondensed hexagonal systems with h ...
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Ars Comb. 106, 11-32 (2012). Research Article. PI index of extremal simple pericondensed hexagonal systems. Hao, Jianxiu; He, Lili; Huang, Min.
May 6, 2024 · PI Index of Extremal Simple Pericondensed Hexagonal Systems. Ars ... PI Index of Some Simple Pericondensed Hexagonal Systems. Ars Comb ...
The Padmakar-Ivan (PI) index is a Wiener-Szeged-like topological index, which reflects certain structural features of organic molecules. In this paper, we study ...
(Received: 5 December 2001). Abstract. The Wiener index W is the sum of distances between all pairs of vertices of a (connected) graph. Hexagonal systems ...
Jianxiu Hao, LiLi He and Min Huang, “PI Index of Extremal Simple Pericondensed Hexagonal Systems”, pp. 33-46; Shu-Guang Guo, “On the Laplacian Spectral ...
