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def definition def or abbrev

fromInt

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formal statement (Lean)

 200def fromInt : Int → LogicInt
 201  | Int.ofNat n   => mk (LogicNat.fromNat n) LogicNat.zero
 202  | Int.negSucc n => mk LogicNat.zero (LogicNat.fromNat (Nat.succ n))
 203

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