simp
case hg
a : ℝ
ha : 0 < a
⊢ Tendsto (fun b => ∫ (x : ℝ) in 0 ..a, ↑↑b * DiracSeq 1 (↑↑b * x)) atTop (nhds (1 / 2))
case hg
a : ℝ
ha : 0 < a
⊢ Tendsto (fun b => ↑↑b * ∫ (x : ℝ) in 0 ..a, DiracSeq 1 (↑↑b * x)) atTop (nhds 2⁻¹)