نتایج جستجو برای: multiple zagreb indices

تعداد نتایج: 837989  

Journal: :Mathematical Problems in Engineering 2022

Measurements of graphs and retrieving structural information complex networks using degree-based network entropy have become an informational theoretical concept. This terminology is extended by the concept Shannon entropy. In this paper, we introduce with having edge weights which are basically redefined Zagreb indices. Some bounds calculated to idealize performance in limiting different kinds...

Journal: :European Journal of Pure and Applied Mathematics 2020

Journal: :Communications in Mathematics and Applications 2019

2008
Boris Hollas

We consider topological indices I that are sums of f(deg(u))f(deg(v)), where {u, v} are adjacent vertices and f is a function. The Randić connectivity index or the Zagreb group index are examples for indices of this kind. In earlier work on topological indices that are sums of independent random variables, we identified the correlation between I and the edge set of the molecular graph as the ma...

Journal: :Discrete Applied Mathematics 2011
Vesna Andova Saso Bogoev Darko Dimitrov Marcin Pilipczuk Riste Skrekovski

For a simple graph G with n vertices and m edges, the inequality M1(G)/n ≤ M2(G)/m, where M1(G) and M2(G) are the first and the second Zagreb indices of G, is known as Zagreb indices inequality. According to this inequality, a set S of integers is good if for every graph whose degrees of vertices are in S, the inequality holds. We characterize that an interval [a, a+n] is good if and only if a ...

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