rfl
case h_add
R : Type u_1
ι : Type u_2
inst✝ : CommSemiring R
i : ι
p : MvPolynomial ι R
x : ι →₀ ℕ
hp : x ∈ p.support
a✝¹ : ι
a✝ : a✝¹ ∈ x.support ∪ (Finsupp.single i (p.totalDegree - x.sum fun x m => m)).support
b₁✝ b₂✝ : ℕ
⊢ b₁✝ + b₂✝ = b₁✝ + b₂✝
no goals