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lemma proved term proof

J_at_one

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formal statement (Lean)

  92lemma J_at_one : J 1 = 0 := by unfold J; norm_num

proof body

Term-mode proof.

  93
  94/-- J(x) = 0 iff x = 1 (for positive x). -/

used by (21)

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depends on (4)

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