The PI and Edge Szeged Indices of One-Heptagonal Carbon Nanocones

被引：14

作者：

Ashrafi, Ali Reza ^{[1
]}

Gholami-Nezhaad, Farzaneh ^{[1
]}

机构：

[1] Univ Kashan, Inst Nanosci & Nanotechnol, Kashan 87317, Iran

来源：

CURRENT NANOSCIENCE | 2009年 / 5卷 / 01期

关键词：

One pentagonal carbon nanocone; PI index; edge Szeged index; WIENER INDEX; ARMCHAIR POLYHEX; TUC4C8(R);

D O I：

10.2174/157341309787314629

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

The Padmakar-Ivan (PI) index of a graph G is defined as PI(G) = Sigma[m(u)(e)+ m(v)(e)], where m(u)(e) is the number of edges of G lying closer to u than to v, m(v)(e) is the number of edges of G lying closer to v than to u and summation goes over all edges of G. The edge Szeged index is a new molecular structure descriptor equal to the sum of products m(u)(e)m(v)(e) over all edges e = uv of the molecular graph G. In this paper, the PI and edge Szeged indices of one-heptagonal carbon nanocone CNC7[n] computed for the first time.

引用

页码：51 / 53

页数：3

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