trans (∑ m in Finset.Icc 1 (Nat.floor $ Real.sqrt s.level), 1 / (m:ℝ))
s : SelbergSieve
hnu : s.nu = (↑ζ).pdiv ↑ArithmeticFunction.id
hP : ∀ (p : ℕ), p.Prime → ↑p ≤ s.level → p ∣ s.prodPrimes
⊢ s.selbergBoundingSum ≥ s.level.log / 2
s : SelbergSieve
hnu : s.nu = (↑ζ).pdiv ↑ArithmeticFunction.id
hP : ∀ (p : ℕ), p.Prime → ↑p ≤ s.level → p ∣ s.prodPrimes
⊢ s.selbergBoundingSum ≥ ∑ m ∈ Finset.Icc 1 ⌊√s.level⌋₊, 1 / ↑m

s : SelbergSieve
hnu : s.nu = (↑ζ).pdiv ↑ArithmeticFunction.id
hP : ∀ (p : ℕ), p.Prime → ↑p ≤ s.level → p ∣ s.prodPrimes
⊢ ∑ m ∈ Finset.Icc 1 ⌊√s.level⌋₊, 1 / ↑m ≥ s.level.log / 2