Thou must not pill and poll thy tenant, that thou mayest have, as they say, Unde, and that thy never enough, to ruffle it out in a riotous ruff, and a prodigal, dissolute, and licentious living.

1562: The Verye Trueth of the Conference Betvvixt the Queene Mother, and the Prince of Conde, Iulye, 1562, main title (W. Seres)

The Coxeter diagrams of type E₇ and E₈ have no nontrivial automorphisms, so σ₀ is trivial in those cases. […] The Coxeter diagram of type F₄ has a unique nontrivial automorphism, but σ₀ is trivial in this case. One can see this by using the Dynkin diagram instead of the Coxeter diagram and noting that it does not have any nontrivial automorphisms.

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