A note on the Sombor coindex of graphs

Articles in Press

Document Type : Erratum

Authors

1 General Education Department, Anhui Xinhua University, Hefei, 230088, China

2 Department of Mathematics, Azarbaijan Shahid Madani University, Tabriz, Iran

3 Faculty of Education, Van Yuzuncu Yil University, Van, Turkey

Abstract

In this note, we point out several critical inaccuracies in a recent paper on the Sombor coindex of graphs [On Sombor coindex of graphs, Commun. Comb. Optim. 8 (2023), no. 3, 513–529.]. We identify fundamental errors in the main results and provide concrete counterexamples to refute them.

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References

[1] A.R. Ashrafi, T. Došlić, and A. Hamzeh, The Zagreb coindices of graph operations, Discrete Appl. Math. 158 (2010), no. 15, 1571–1578. https://doi.org/10.1016/j.dam.2010.05.017
[2] E. Milovanović, S. Stankov, M. Matejić, and I. Milovanović, Some observations on Sombor coindex of graphs, Commun. Comb. Optim. 9 (2024), no. 4, 813–825. https://doi.org/10.22049/cco.2023.28762.1707
[3] C. Phanjoubam, S.M. Mawiong, and A.M. Buhphang, On Sombor coindex of graphs, Commun. Comb. Optim. 8 (2023), no. 3, 513–529. https://doi.org/10.22049/CCO.2022.27751.1343
Communications in Combinatorics and Optimization

Articles in Press, Accepted Manuscript
Available Online from 28 July 2026

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