Abstract
Let \(G=(V,E)\) be a graph. A set \(S\subseteq V\) is a total k-dominating set if every vertex \(v\in V\) has at least k neighbors in S. The total k-domination number \(\gamma _{kt}(G)\) is the minimum cardinality among all total k-dominating sets. In this paper we obtain several tight bounds for the total k-domination number of the Cartesian product of two graphs, and we investigate the relationship between the total k-domination number of the Cartesian product graph with respect to the total k-domination number in the factors of the product. We also study the total k-domination number in certain particular cases of Cartesian products of graphs and determine the exact values of this parameter.
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Acknowledgements
This Research was partly supported by Plan Nacional I+D+I Grants MTM2015-70531-P and MTM 2013–46374-P (Spain), Junta de Andalucía FQM-260 (Spain) and CONACYT (FOMIX-CONACYT-UAGro-249818) (Mexico).
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Bermudo, S., Sanchéz, J.L. & Sigarreta, J.M. Total k-domination in Cartesian product graphs. Period Math Hung 75, 255–267 (2017). https://doi.org/10.1007/s10998-017-0191-2
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DOI: https://doi.org/10.1007/s10998-017-0191-2