Sombor index of trees with at most three branch vertices
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摘要
Let G be a graph with set of vertices V(G) and set of edges E(G). The Sombor index is a vertex-degree-based-topological index recently introduced by Ivan Gutman, defined asSO(G)=∑uv∈E(G)(du)2+(dv)2.In this paper we determine the extremal values of SO over trees with at most three branch vertices.
论文关键词:Sombor index,Extremal values,Trees,Branch vertices
论文评审过程:Received 15 February 2021, Revised 24 May 2021, Accepted 29 May 2021, Available online 13 June 2021, Version of Record 13 June 2021.
论文官网地址:https://doi.org/10.1016/j.amc.2021.126414