Henneberg Surface

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     Henneberg Minimal Surface Parametric  Equations

  x = 2 * sinh(u) * cos(v) - 2 * sinh(3 * u) * cos(3 * v) / 3
  y = 2 * sinh(u) * sin(v) - 2 * sinh(3 * u) * sin(3 * v) / 3
  z = 2 * cosh(2 * u) * cos(2 * v)