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lemma proved term proof

linJ_unit

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formal statement (Lean)

  75lemma linJ_unit (L : ℝ) : linJ 1 L = 0 := by simp [linJ]

proof body

Term-mode proof.

  76
  77/-- The key identity connecting linJ to the derivative:
  78    linJ(x, L) = J'(x) · x · L
  79
  80    Algebraic identity: (x - x⁻¹)/2 = ((1 - x⁻²)/2) · x -/

depends on (5)

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