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theorem proved term proof

phi_ladder_ne_one

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formal statement (Lean)

  57theorem phi_ladder_ne_one {n : ℤ} (hn : n ≠ 0) : phi_ladder n ≠ 1 :=

proof body

Term-mode proof.

  58  phi_zpow_ne_one hn
  59
  60/-! ## Part II: Positive Cost on the φ-Ladder -/
  61

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