intro x hx
case refine'_2
R : Type u_1
ι : Type u_2
inst✝ : CommSemiring R
i : ι
p : MvPolynomial ι R
hp : p ≠ 0
hjp : ∀ j ∈ p.support, j i = 0
h : homogenization i p = 0
this : Set.InjOn (fun j => j + Finsupp.single i (p.totalDegree - j.sum fun x m => m)) {w | w i = 0}
⊢ ↑(Finsupp.support 0) ⊆ {w | w i = 0}
case refine'_2
R : Type u_1
ι : Type u_2
inst✝ : CommSemiring R
i : ι
p : MvPolynomial ι R
hp : p ≠ 0
hjp : ∀ j ∈ p.support, j i = 0
h : homogenization i p = 0
this : Set.InjOn (fun j => j + Finsupp.single i (p.totalDegree - j.sum fun x m => m)) {w | w i = 0}
x : ι →₀ ℕ
hx : x ∈ ↑(Finsupp.support 0)
⊢ x ∈ {w | w i = 0}