--- /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_rmap.ma".
+include "ground/relocation/tr_compose_eq.ma".
+include "ground/relocation/tr_pn_eq.ma".
+
+(* UNWIND MAP FOR PATH ******************************************************)
+
+(* Constructions with stream_eq *********************************************)
+
+lemma unwind2_rmap_eq_repl (p):
+ stream_eq_repl … (λf1,f2. ▶[f1]p ≗ ▶[f2]p).
+#p elim p -p //
+* [ #n ] #p #IH #f1 #f2 #Hf
+[ /3 width=1 by tr_compose_eq_repl/
+| /2 width=1 by/
+| /3 width=1 by tr_push_eq_repl/
+| /2 width=1 by/
+| /2 width=1 by/
+]
+qed-.