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Comparison between Merrifield-Simmons Index and Wiener Index of Graphs

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Abstract

The Merrifield-Simmons index σ is the total number of independent vertex sets (including the empty set) of the graph G. The Wiener index W is the sum of distances in all unordered pairs of vertices of G. We construct some new graphs satisfying σ > W and W > σ, respectively. In particular, infinite graphs satisfying W > σ are invented with graphs with diameter 2 and infinite ones satisfying σ > W are discovered with so-called universally diametrical graphs.

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Acknowledgements

We thank the referees for their valuable comments on our paper, which have considerably improved the presentation of this paper.

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Correspondence to Kinkar Chandra Das.

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Kexiang Xu is supported by NNSF of China (Grant No. 11671202) and K. C. Das is supported by National Research Foundation funded by the Korean government (Grant No. 2021R1F1A1050)

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Xu, K.X., Das, K.C., Gutman, I. et al. Comparison between Merrifield-Simmons Index and Wiener Index of Graphs. Acta. Math. Sin.-English Ser. 38, 2220–2230 (2022). https://doi.org/10.1007/s10114-022-0540-9

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