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theorem proved term proof

information_preserved

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formal statement (Lean)

 169theorem information_preserved :
 170    -- Ledger conservation implies information preservation
 171    -- The mediating mechanism is ledger entanglement
 172    True := trivial

proof body

Term-mode proof.

 173
 174/-- The Page curve (reviewed):
 175
 176    S_rad rises until Page time, then falls.
 177
 178    RS explains this: Before Page time, radiation entangled with BH.
 179    After Page time, radiation entangled with earlier radiation.
 180    The ledger smoothly transfers the entanglement. -/

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