ButterflyGraph() constructs the butterfly graph, a planar undirected graph with 5 vertices and 6 edges.

$\mathrm{with}\left(\mathrm{GraphTheory}\right)\:$

$\mathrm{with}\left(\mathrm{SpecialGraphs}\right)\:$

$B≔\mathrm{ButterflyGraph}\left(\right)$

$B≔\mathrm{Graph\; 1:\; an\; undirected\; graph\; with\; 5\; vertices\; and\; 6\; edge(s)}$

$\mathrm{ChromaticNumber}\left(B\right)$

$3$

$\mathrm{Girth}\left(B\right)$

$3$

$\mathrm{DrawGraph}\left(B\right)$

"Butterfly graph", Wikipedia. http://en.wikipedia.org/wiki/Butterfly_graph

The GraphTheory[SpecialGraphs][ButterflyGraph] command was introduced in Maple 2021.

For more information on Maple 2021 changes, see Updates in Maple 2021.