construct Gray graph
The GrayGraph() command returns the Gray graph, a bipartite cubic graph with 54 vertices and 81 edges.
It was discovered by Marion Gray in 1932.
G≔Graph 1: an undirected unweighted graph with 54 vertices and 81 edge(s)
"Gray graph", Wikipedia. http://en.wikipedia.org/wiki/Gray_graph
The GraphTheory[SpecialGraphs][GrayGraph] command was introduced in Maple 2018.
For more information on Maple 2018 changes, see Updates in Maple 2018.
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