Lower and Upper Bounds for Hyper-Zagreb Index of Graphs
DOI:
https://doi.org/10.24996/ijs.2020.61.6.18Keywords:
Hyper-Zagreb index, Vertex degree, First and second Zagreb indicesAbstract
The topological indices are functions on the graph that do not depend on the labeling of their vertices. They are used by chemists for studying the properties of chemical compounds. Let be a simple connected graph. The Hyper-Zagreb index of the graph , is defined as ,where and are the degrees of vertex and , respectively. In this paper, we study the Hyper-Zagreb index and give upper and lower bounds for .
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Published
2020-06-27
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Mathematics
How to Cite
Lower and Upper Bounds for Hyper-Zagreb Index of Graphs. (2020). Iraqi Journal of Science, 61(6), 1401-1406. https://doi.org/10.24996/ijs.2020.61.6.18
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