exact s.one_div_selbergTerms_eq_conv_moebius_nu l
  (Squarefree.squarefree_of_dvd hlP s.prodPrimes_squarefree)
  (_root_.ne_of_gt $ s.nu_pos_of_dvd_prodPrimes hlP)
case a.a
s : Sieve
l : ℕ
a✝ : l > 0
hlP : l ∈ fun x => ∃ c, P = x * c
⊢ 1 / g l = ∑ i ∈ l.divisors, ↑(μ (l / i)) * (ν i)⁻¹
no goals