نتایج جستجو برای: first zagreb index

تعداد نتایج: 1785322  

Journal: :Journal of Taibah University for Science 2018

2015
Mohammad Reza FARAHANI Rajesh M. R. KANNA Mohammad R. FARAHANI Rajesh M.R. KANNA

A topological index of a graph is a numeric quantity related to a structure of a molecule which is invariant under graph automorphism. Recently, Ghorbani and Hosseinzadeh introduced Fourth Zagreb index of graphs. In this paper we determine a closed formula of this new topological index of the famous Benzenoid family named Circumcoronene series of Benzenoid Hk.

Journal: :European Journal of Pure and Applied Mathematics 2020

Journal: :AKCE International Journal of Graphs and Combinatorics 2021

Journal: :International Journal of Apllied Mathematics 2020

Journal: :AKCE International Journal of Graphs and Combinatorics 2020

Journal: :Symmetry 2023

The matrix representations of hypergraphs have been defined via hypermatrices initially. In recent studies, the Laplacian hypergraphs, a generalization matrix, has introduced. this article, based on definition, we derive bounds depending pair-degree, maximum degree, and first Zagreb index for greatest eigenvalue energy r-uniform regular hypergraphs. As result these bounds, Nordhaus–Gaddum type ...

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