∀ (R : Type u_1) (S : Type u_3) [inst : CommRing R] [inst_1 : CommRing S] [inst_2 : Algebra R S]
  [inst_3 : Subsingleton S],
  Ideal.span (Set.range fun x => 1) = { val := fun x => 1, σ' := fun x => 1, aeval_val_σ' := ⋯, algebraMap_eq := ⋯ }.ker