∀ (α : Type u_1) (E : Type u_2) {F : Type u_3} [inst : NormedAddCommGroup E] [inst_1 : NormedSpace ℝ E]
  [inst_2 : NormedAddCommGroup F] [inst_3 : NormedSpace ℝ F] {m : MeasurableSpace α} (μ : MeasureTheory.Measure α)
  {T : Set α → E →L[ℝ] F} {C : ℝ},
  MeasureTheory.DominatedFinMeasAdditive μ T C →
    ∀ (c : ℝ) (f : ↥(MeasureTheory.Lp.simpleFunc E 1 μ)),
      MeasureTheory.L1.SimpleFunc.setToL1S T (c • f) = c • MeasureTheory.L1.SimpleFunc.setToL1S T f