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lemma proved term proof

J_bit_pos

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formal statement (Lean)

  55lemma J_bit_pos : 0 < J_bit := by

proof body

Term-mode proof.

  56  unfold J_bit φ
  57  exact Real.log_pos Constants.one_lt_phi
  58
  59/-! ## Recognition Cost Model -/
  60
  61/-- Recognition cost for scale ratio x: J(x) = ½(x + 1/x) - 1 -/

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depends on (13)

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