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lemma proved term proof

deriv_Jlog

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formal statement (Lean)

  30lemma deriv_Jlog (t : ℝ) : deriv Jlog t = sinh t := by

proof body

Term-mode proof.

  31  exact (hasDerivAt_Jlog_new t).deriv
  32
  33/-- Second derivative of Jlog is cosh -/

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