Some new upper bounds for the inverse sum indeg index of graphs

被引：9

作者：

Ali, Akbar ^{[1
,2
]}

Matejic, Marjan ^{[3
]}

Milovanovic, Emina ^{[3
]}

Milovanovic, Igor ^{[3
]}

机构：

[1] Univ Hail, Coll Sci, Hail, Saudi Arabia

[2] Univ Management & Technol, Knowledge Unit Sci, Sialkot, Pakistan

[3] Univ Nis, Fac Elect Engn, POB 73, Nish 18000, Serbia

来源：

ELECTRONIC JOURNAL OF GRAPH THEORY AND APPLICATIONS | 2020年 / 8卷 / 01期

关键词：

vertex-degree-based topological indices; inverse sum indeg index; Zagreb indices; multiplicative Zagreb indices; MOLECULAR-ORBITALS;

D O I：

10.5614/ejgta.2020.8.1.5

中图分类号：

O1 [数学];

学科分类号：

0701 ; 070101 ;

摘要：

Let G = (V, E) be a simple connected graph with the vertex set V = {1, 2, . . . , n} and sequence of vertex degrees (d(1), d(2), . . . , d(n)) where di denotes the degree of a vertex i is an element of V. With i similar to j, we denote the adjacency of the vertices i and j in the graph G. The inverse sum indeg (ISI) index of the graph G is defined as ISI(G) = Sigma(i similar to j)d(i)d(j)/d(i)+d(j). Some new upper bounds for the ISI index are obtained in this paper.

引用

页码：59 / 70

页数：12

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