. refine Filter.eventually_of_forall ?_
  intro x
  simp
  rw [abs_of_nonneg (DiracSeq.nonneg_nat _)]
  refine mul_le_mul_of_nonneg_right (hM x) (DiracSeq.nonneg_nat x)
case this.refine_2
a : ℝ
ha : 0 < a
φ : ℝ → ℝ
hφ : IsBump φ
y M : ℝ
hM : ∀ (x : ℝ), ‖φ x - y‖ ≤ M
n : ℕ+
⊢ ∀ᵐ (x : ℝ) ∂Measure.restrict volume (Set.Ioi a), ‖(φ x - y) * DiracSeq (↑↑n) x‖ ≤ M * DiracSeq (↑↑n) x
no goals