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def definition def or abbrev

empty_ledger

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formal statement (Lean)

 108def empty_ledger : Ledger := {

proof body

Definition body.

 109  events := []
 110  double_entry := fun _ => by simp [List.count_nil]
 111}
 112
 113/-- The empty ledger is balanced. -/

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depends on (6)

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