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theorem proved term proof

rational_root_theorem_for_phi

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formal statement (Lean)

  96theorem rational_root_theorem_for_phi :
  97    (1 : ℝ)^2 - 1 - 1 ≠ 0 ∧ ((-1 : ℝ))^2 - (-1) - 1 ≠ 0 := by

proof body

Term-mode proof.

  98  constructor <;> norm_num
  99
 100/-- **THEOREM IC-002.7**: There is no finite-precision algorithm that exactly computes
 101    φ in the sense that any rational number differs from φ. -/

depends on (6)

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