Senbagamalar, J., Babujee, J., Gutman, I. (2014). On Wiener index of graph complements. Transactions on Combinatorics, 3(2), 11-15. doi: 10.22108/toc.2014.4577
Jaisankar Senbagamalar; Jayapal Baskar Babujee; Ivan Gutman. "On Wiener index of graph complements". Transactions on Combinatorics, 3, 2, 2014, 11-15. doi: 10.22108/toc.2014.4577
Senbagamalar, J., Babujee, J., Gutman, I. (2014). 'On Wiener index of graph complements', Transactions on Combinatorics, 3(2), pp. 11-15. doi: 10.22108/toc.2014.4577
Senbagamalar, J., Babujee, J., Gutman, I. On Wiener index of graph complements. Transactions on Combinatorics, 2014; 3(2): 11-15. doi: 10.22108/toc.2014.4577
Let $G$ be an $(n,m)$-graph. We say that $G$ has property $(\ast)$ if for every pair of its adjacent vertices $x$ and $y$, there exists a vertex $z$, such that $z$ is not adjacent to either $x$ or $y$. If the graph $G$ has property $(\ast)$, then its complement $\overline G$ is connected, has diameter 2, and its Wiener index is equal to $\binom{n}{2}+m$, i.e., the Wiener index is insensitive of any other structural details of the graph $G$. We characterize numerous classes of graphs possessing property $(\ast)$, among which are trees, regular, and unicyclic graphs.
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