simp only [homogenization, totalDegree_one, zero_tsub, add_zero, Finsupp.single_zero]
R : Type u_1
ι : Type u_2
inst✝ : CommSemiring R
i : ι
⊢ homogenization i 1 = 1
R : Type u_1
ι : Type u_2
inst✝ : CommSemiring R
i : ι
⊢ Finsupp.mapDomain (fun j => j) 1 = 1