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theorem proved decidable or rfl

sign_indistinguishable

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formal statement (Lean)

  86theorem sign_indistinguishable (n m : ℤ) :
  87    Indistinguishable signRecognizer n m ↔ signOf n = signOf m := by

proof body

Decided by rfl or decide.

  88  rfl
  89
  90/-- **Theorem**: -5 ~ -3 (both negative) -/

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