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def definition def or abbrev

cycStep

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formal statement (Lean)

  43def cycStep (k : ℕ) (x : Fin (modulus k)) : Fin (modulus k) :=

proof body

Definition body.

  44  ⟨(x.val + 1) % modulus k, Nat.mod_lt _ (modulus_pos k)⟩
  45
  46/-- Interpret the free orbit periodically in a finite cyclic carrier. -/

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