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theorem proved term proof

inv_phi_eq

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formal statement (Lean)

  29theorem inv_phi_eq : phi⁻¹ = phi - 1 := by

proof body

Term-mode proof.

  30  have h := phi_sq_eq
  31  field_simp [phi_ne_zero]
  32  linarith
  33
  34/-- Pareto exponent = φ. -/

used by (2)

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depends on (5)

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