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def definition def or abbrev

fromNat

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formal statement (Lean)

  88noncomputable def fromNat (δ : ℤ) (m : Nat) : DeltaSub δ := fromZ δ (Int.ofNat m)

proof body

Definition body.

  89
  90/-- Extract a nonnegative "k‑index" from a δ‑element as `Int.toNat (toZ ...)`. -/

used by (19)

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