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Information Journal Paper

Title

Some observations on sombor coindex of graphs

Pages

  813-825

Abstract

 Let $G=(V,E)$, $V=\left\{ v_{1},v_{2},\ldots ,v_{n}\right\}$, be a simple graph of order $n$ and size $m$, without isolated vertices. The Sombor coindex of a graph $G$ is defined as  $\overline{SO}(G)=\sum_{i\nsim j}\sqrt{d_i^2+d_j^2}$ , where $d_i= d(v_i)$ is a degree of vertex $v_i$, $i=1,2,\ldots , n$. In this paper we investigate a relationship  between  Sombor coindex and a number of other topological coindices.

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