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def definition def or abbrev

intRel

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formal statement (Lean)

  42def intRel : (LogicNat × LogicNat) → (LogicNat × LogicNat) → Prop :=

proof body

Definition body.

  43  fun p q => p.1 + q.2 = q.1 + p.2
  44

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depends on (1)

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