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def definition def or abbrev

hypothesis3

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formal statement (Lean)

 106noncomputable def hypothesis3 : ℝ := 1 / phi^2

proof body

Definition body.

 107
 108/-- Hypothesis 4: λ = (3 - φ)/3
 109
 110    (3 - 1.618)/3 = 1.382/3 = 0.461
 111
 112    Too large. -/

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