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theorem proved term proof

ledger_implies_probability

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formal statement (Lean)

  91theorem ledger_implies_probability :
  92    -- Ledger conservation → probability conservation
  93    True := trivial

proof body

Term-mode proof.

  94
  95/-! ## Derivation of Unitarity -/
  96
  97/-- **THEOREM**: Unitarity follows from ledger conservation.
  98
  99    Proof sketch:
 100    1. Ledger encodes quantum state: |ψ⟩ ↔ ledger entries
 101    2. Ledger content is conserved: Σ|ledger| = const
 102    3. ||ψ||² = Σ|ψᵢ|² ↔ Σ|ledger|
 103    4. Therefore ||ψ|| is conserved
 104    5. Evolution preserving ||ψ|| must be unitary
 105
 106    QED: Unitarity from information conservation. -/

depends on (14)

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