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def definition def or abbrev

singleton

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formal statement (Lean)

  88def singleton (t : Transaction) : Ledger := {

proof body

Definition body.

  89  transactions := [t],
  90  total_debit := t.debit,
  91  total_credit := t.credit,
  92  global_balance := t.balanced
  93}
  94
  95/-- Append a transaction to a ledger. -/

used by (16)

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depends on (2)

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