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Let G(V,E) be a simple connected graph. A set S⊆V is a power dominating set (PDS) of G, if every vertex and every edge in the system is observed following the observation rules of power system monitoring. The minimum cardinality of a PDS of a graph G is the power domination number γp(G). In this paper, we establish a fundamental result that would provide a lower bound for the power domination number...
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