Proof ptc_chk_wft _ _ v6_algorithms.

(* Specifications: *)
Lemma check_type :
forall (e : env_v6) (t T : trm_v6), wf_v6 e -> check_dec _ v6_pts e t T.
Lemma check_type :
forall (e : env_v6) (t T : trm_v6), wf_v6 e -> check_dec _ v6_pts e t T.