proposition: Lemma twoarrow_fun_data_property : forall a u v, twoarrow_hypothesis a u v -> funtyd_property (twoarrow_fun_data a u v).
proof: Proof. ir. uh H; ee. uf twoarrow_fun_data. start_funtyd_proof; funtyd_dispatch. Qed.
imports: Arith cat_examples cardinal fc_limits