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def definition def or abbrev

empty

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formal statement (Lean)

  80def empty : Ledger := {

proof body

Definition body.

  81  transactions := [],
  82  total_debit := 0,
  83  total_credit := 0,
  84  global_balance := by omega
  85}
  86
  87/-- A singleton ledger. -/

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depends on (4)

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