construct Coxeter graph
The CoxeterGraph command creates the Coxeter graph, which is a nonhamiltonian 3-regular graph on 28 vertices and 42 edges.
It is named after H. S. M. Coxeter.
C ≔ CoxeterGraph⁡
C≔Graph 1: an undirected graph with 28 vertices and 42 edge(s)
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