∀ {M : Type u_1} [inst : AddMonoid M] [inst_1 : MeasurableSpace M] [MeasurableAdd₂ M] {μ ν ρ : MeasureTheory.Measure M}
  [ρ.IsAddLeftInvariant] [MeasureTheory.SFinite ν], ν.AbsolutelyContinuous ρ → (μ.conv ν).AbsolutelyContinuous ρ