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Bounds on the Locating Roman Domination Number in Trees

Nader Jafari RadHadi Rahbani — 2018

Discussiones Mathematicae Graph Theory

A Roman dominating function (or just RDF) on a graph G = (V, E) is a function f : V → 0, 1, 2 satisfying the condition that every vertex u for which f(u) = 0 is adjacent to at least one vertex v for which f(v) = 2. The weight of an RDF f is the value f(V (G)) = ∑u∈V(G) f(u). An RDF f can be represented as f = (V0, V1, V2), where Vi = v ∈ V : f(v) = i for i = 0, 1, 2. An RDF f = (V0, V1, V2) is called a locating Roman dominating function (or just LRDF) if N(u) ∩ V2 ≠ N(v) ∩ V2 for any pair u, v of...

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