image/svg+xml C 3 ~ 1 2 3 4 Cartan : 2 - 2 0 0 - 2 2 - 1 0 0 - 1 2 - 2 0 0 - 2 2 C 3 ~ Directed Undirected 1 2 3 4 Cartan : 2 - 1 0 0 - 2 2 - 1 0 0 - 1 2 - 1 0 0 - 2 2 Schlafli : 2 - 2 0 0 - 2 2 - 1 0 0 - 1 2 - 2 0 0 - 2 2 Coxeter : 1 4 2 2 4 1 3 2 2 3 1 4 2 2 4 1
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