simp [List.map, List.append]
case nil
η : Type u_η
dec_η : DecidableEq η
sch : Schema
τ : Type u
inst : DecidableEq τ
c : η
vs : List (Option τ)
t : Table []
⊢ List.map Prod.fst (Schema.append [] [(c, τ)]) = List.map Prod.fst [] ++ [c]
no goals