DihedralGroup.orderOf_r

∀ {n : ℕ} [NeZero n] (i : ZMod n), orderOf (DihedralGroup.r i) = n / n.gcd i.val

If 0 < n, then r i has order n / gcd n i.

Defined in: Mathlib.GroupTheory.SpecificGroups.Dihedral
Cited by: 1 results in Mathlib
Foundations: Depth 71 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: NeZero

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