exact hassoc
case refine_3
f g : Multiset (ℤ√(-3))
hf : ∀ x ∈ f, OddPrimeOrFour x.norm.natAbs
hg : ∀ x ∈ g, OddPrimeOrFour x.norm.natAbs
hassoc : Associated f.prod.norm g.prod.norm
⊢ Associated f.prod.norm g.prod.norm
no goals