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theorem proved term proof

J_one_zero

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formal statement (Lean)

 275theorem J_one_zero : Jcost 1 = 0 := Jcost_unit0

proof body

Term-mode proof.

 276
 277/-- **THEOREM**: J(φ²) = J(φ+1) by the golden ratio identity φ²=φ+1.
 278    Each step up the φ-ladder is controlled by the Fibonacci recursion. -/

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