proposition: Theorem trie_vec `(x : Trie a s) : trie (vec x) ≈ x.
proof: Proof. now simpl; rewrite vec_trie. Qed.
imports: Category.Lib Category.Theory.Category Category.Theory.Isomorphism Category.Theory.Functor Category.Theory.Adjunction Category.Structure.Terminal Category.Structure.Cartesian Category.Structure.BiCCC Category.Instance.Fun Category.Instance.Coq Category.Instance.Sets Coq.Vectors.Vector