∀ {α : Type u_1} {E : Type u_2} {m : MeasurableSpace α} [inst : NormedAddCommGroup E] {p : ENNReal}
  {μ : MeasureTheory.Measure α} {f g : α → E},
  MeasureTheory.AEStronglyMeasurable f μ →
    MeasureTheory.AEStronglyMeasurable g μ →
      1 ≤ p → MeasureTheory.eLpNorm (f - g) p μ ≤ MeasureTheory.eLpNorm f p μ + MeasureTheory.eLpNorm g p μ