Geodesic
Connected partition dimensions of graphs
Discussiones Mathematicae. Graph Theory, Tome 22 (2002) no. 2, pp. 305-323.

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For a vertex v of a connected graph G and a subset S of V(G), the distance between v and S is d(v,S) = mind(v,x)|x ∈ S. For an ordered k-partition Π = S₁,S₂,...,Sₖ of V(G), the representation of v with respect to Π is the k-vector r(v|Π) = (d(v,S₁), d(v,S₂),..., d(v,Sₖ)). The k-partition Π is a resolving partition if the k-vectors r(v|Π), v ∈ V(G), are distinct. The minimum k for which there is a resolving k-partition of V(G) is the partition dimension pd(G) of G. A resolving partition Π = S₁,S₂,...,Sₖ of V(G) is connected if each subgraph 〈S_i〉 induced by S_i (1 ≤ i ≤ k) is connected in G. The minimum k for which there is a connected resolving k-partition of V(G) is the connected partition dimension cpd(G) of G. Thus 2 ≤ pd (G) ≤ cpd(G) ≤ n for every connected graph G of order n ≥ 2. The connected partition dimensions of several classes of well-known graphs are determined. It is shown that for every pair a, b of integers with 3 ≤ a ≤ b ≤ 2a-1, there is a connected graph G having pd(G) = a and cpd(G) = b. Connected graphs of order n ≥ 3 having connected partition dimension 2, n, or n-1 are characterized.
Keywords: distance, resolving partition, connected resolving partition 
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Saenpholphat, Varaporn; Zhang, Ping. Connected partition dimensions of graphs. Discussiones Mathematicae. Graph Theory, Tome 22 (2002) no. 2, pp. 305-323. http://geodesic.mathdoc.fr/item/DMGT_2002_22_2_a7/

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