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theorem proved term proof

paired_event_sum_zero

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formal statement (Lean)

  68theorem paired_event_sum_zero (e : LedgerEvent) : e + e.conj = 0 := by

proof body

Term-mode proof.

  69  cases e with
  70  | mk flow =>
  71      change ({ flow := flow + (-flow) } : LedgerEvent) = { flow := 0 }
  72      simp
  73
  74/-- **PROVED: Conjugation is an involution.** -/

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depends on (7)

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