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theorem proved term proof

isRecognitionConnected_empty

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formal statement (Lean)

  48theorem isRecognitionConnected_empty (r : Recognizer C E) :
  49    IsRecognitionConnected r ∅ := by

proof body

Term-mode proof.

  50  intro c₁ c₂ h₁ _
  51  exact absurd h₁ (Set.not_mem_empty c₁)
  52
  53/-- A singleton set is recognition-connected -/

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