+++ /dev/null
-(**************************************************************************)
-(* ___ *)
-(* ||M|| *)
-(* ||A|| A project by Andrea Asperti *)
-(* ||T|| *)
-(* ||I|| Developers: *)
-(* ||T|| The HELM team. *)
-(* ||A|| http://helm.cs.unibo.it *)
-(* \ / *)
-(* \ / This file is distributed under the terms of the *)
-(* v GNU General Public License Version 2 *)
-(* *)
-(**************************************************************************)
-
-include "delayed_updating/unwind/unwind2_prototerm_eq.ma".
-include "delayed_updating/unwind/unwind2_path_append.ma".
-include "delayed_updating/syntax/prototerm_constructors.ma".
-
-(* TAILED UNWIND FOR PROTOTERM **********************************************)
-
-(* Constructions with constructors ******************************************)
-
-lemma unwind2_term_iref_sn (f) (t) (k:pnat):
- ▼[f∘𝐮❨k❩]t ⊆ ▼[f](𝛕k.t).
-#f #t #k #p * #q #Hq #H0 destruct
-@(ex2_intro … (𝗱k◗𝗺◗q))
-/2 width=1 by in_comp_iref/
-qed-.
-
-lemma unwind2_term_iref_dx (f) (t) (k:pnat):
- ▼[f](𝛕k.t) ⊆ ▼[f∘𝐮❨k❩]t.
-#f #t #k #p * #q #Hq #H0 destruct
-elim (in_comp_inv_iref … Hq) -Hq #p #Hp #Ht destruct
-/2 width=1 by in_comp_unwind2_path_term/
-qed-.
-
-lemma unwind2_term_iref (f) (t) (k:pnat):
- ▼[f∘𝐮❨k❩]t ⇔ ▼[f](𝛕k.t).
-/3 width=2 by conj, unwind2_term_iref_sn, unwind2_term_iref_dx/
-qed.