def definition def or abbrev

`J`

No prose has been written for this declaration yet. The Lean source and graph data below render without it.

formal statement (Lean)

  45noncomputable def J (x : ℝ) : ℝ := (x + x⁻¹) / 2 - 1

Definition body.

  46
  47/-- J equals the standard Jcost. -/