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theorem proved term proof

J_symmetric

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formal statement (Lean)

  27theorem J_symmetric {x : ℝ} (_hx : x ≠ 0) : J x = J (x⁻¹) := by

proof body

Term-mode proof.

  28  simp only [J, inv_inv]; ring
  29
  30/-- J-symmetry in ratio form: J(a/b) = J(b/a). -/

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depends on (2)

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