image/svg+xml E 8 ~ ++ + 1 2 3 4 5 6 7 8 9 10 11 Cartan = Schlafli 2 - 1 0 0 0 0 0 0 0 0 0 - 1 2 - 1 0 0 0 0 0 0 0 0 0 - 1 2 - 1 0 0 0 0 0 0 0 0 0 - 1 2 - 1 0 0 0 0 0 0 0 0 0 - 1 2 - 1 0 0 0 0 0 0 0 0 0 - 1 2 - 1 0 0 0 0 0 0 0 0 0 - 1 2 - 1 0 0 0 0 0 0 0 0 0 - 1 2 - 1 0 - 1 0 0 0 0 0 0 0 - 1 2 - 1 0 0 0 0 0 0 0 0 0 - 1 2 0 0 0 0 0 0 0 0 - 1 0 0 2 Coxeter 1 3 2 2 2 2 2 2 2 2 2 3 1 3 2 2 2 2 2 2 2 2 2 3 1 3 2 2 2 2 2 2 2 2 2 3 1 3 2 2 2 2 2 2 2 2 2 3 1 3 2 2 2 2 2 2 2 2 2 3 1 3 2 2 2 2 2 2 2 2 2 3 1 3 2 2 2 2 2 2 2 2 2 3 1 3 2 3 2 2 2 2 2 2 2 3 1 3 2 2 2 2 2 2 2 2 2 3 1 2 2 2 2 2 2 2 2 3 2 2 1
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