A technique for reconstructing disconnected graphs
From two graphs G1 and G2 on N1 and N2 vertices respectively, the compound graph G1[G2] on N1N2 vertices is obtained by connecting in some way N2 copies of G1.We present in this paper methods of compounding that result in families of graphs with large number of vertices for given values of the maximum degree ∆ and diameter D.
The basis number of a graph is defined by Schmeichel to be the least integer such that has an -fold basis for its cycle space. MacLane showed that a graph is planar if and only if its basis number is . Schmeichel proved that the basis number of the complete graph is at most . We generalize the result of Schmeichel by showing that the basis number of the -th power of is at most .