Geodesic
On domination in graphs
Discussiones Mathematicae. Graph Theory, Tome 25 (2005) no. 1-2, pp. 7-12

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For a finite undirected graph G on n vertices two continuous optimization problems taken over the n-dimensional cube are presented and it is proved that their optimum values equal the domination number γ of G. An efficient approximation method is developed and known upper bounds on γ are slightly improved.
Keywords: graph, domination 
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Göring, Frank; Harant, Jochen. On domination in graphs. Discussiones Mathematicae. Graph Theory, Tome 25 (2005) no. 1-2, pp. 7-12. http://geodesic.mathdoc.fr/item/DMGT_2005_25_1-2_a0/