∀ {α : Type u_1} {ε : Type u_3} {m : MeasurableSpace α} [inst : TopologicalSpace ε] [inst_1 : ESeminormedAddMonoid ε]
  {μ : MeasureTheory.Measure α} {f g : α → ε},
  MeasureTheory.AEStronglyMeasurable f μ →
    MeasureTheory.AEStronglyMeasurable g μ →
      ∀ (p : ENNReal),
        MeasureTheory.eLpNorm (f + g) p μ ≤
          MeasureTheory.LpAddConst p * (MeasureTheory.eLpNorm f p μ + MeasureTheory.eLpNorm g p μ)