theorem
proved
term proof
scale_at_two
show as:
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formal statement (Lean)
90theorem scale_at_two : phiLadderScale 2 = phi^2 := by
proof body
Term-mode proof.
91 unfold phiLadderScale
92 norm_cast
93
94/-- **THEOREM**: φ-ladder gives exponential hierarchy (φ^n > 1 for n > 0). -/