∀ {M : Type u_1} {α : Type u_2} {β : Type u_3} [inst : MeasurableSpace α] {μ : MeasureTheory.Measure α}
  [inst_1 : TopologicalSpace β] [inst_2 : SMul M α] [inst_3 : MeasurableConstSMul M α]
  [inst_4 : MeasureTheory.SMulInvariantMeasure M α μ] [inst_5 : Zero β] (x : Mᵈᵐᵃ), x • 0 = x • 0