exact factorization'.coprime_of_mem h hcmem
case hy
a b c : ℤ√(-3)
h : IsCoprime a.re a.im
hbmem : b ∈ factorization' h
hcmem : c ∈ factorization' h
hnorm : Associated b.norm c.norm
⊢ IsCoprime c.re c.im
no goals