Abstract

Abstract : A (d,c,v)-graph is a c-connected graph of diameter d in which each node is of valence v. A minimum (d,c,v)-graph is one with the minimum number of nodes. Each minimum (d,c,v)-graph corresponds to an efficient way of arranging the stations of a communication network so that if any c-1 stations are incapacitated, the rest of the network is still connected, and so that in case of breakdown or other difficulty each station can rely for assistance on precisely v others. Here the minimum (d,3,3)-graphs are classified and counted for odd d. (Author)

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