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def definition def or abbrev

arrow_of_time

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formal statement (Lean)

  87def arrow_of_time (s₁ s₂ : LedgerSnapshot) : Prop :=

proof body

Definition body.

  88  before s₁ s₂ ∧ s₂.defect ≤ s₁.defect
  89
  90/-- **Theorem (F-006)**: The arrow of time is well-defined.
  91    If defect decreases along the tick sequence, the temporal
  92    ordering and the thermodynamic arrow agree. -/

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