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theorem proved term proof

terminalArrow_exists

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formal statement (Lean)

  55theorem terminalArrow_exists (A : DistinguishedCarrier) :
  56    TerminalArrow A :=

proof body

Term-mode proof.

  57  reality_from_one_distinction A.Carrier ⟨A.base, A.witness, A.distinct⟩
  58
  59/-- The terminal arrow is unique. Since `TerminalArrow A` is a proposition,
  60this is proof irrelevance. -/

used by (2)

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depends on (10)

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