X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fground%2Frelocation%2Fgr_isi_tl.ma;fp=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fground%2Frelocation%2Fgr_isi_tl.ma;h=4a80d36e42be9a5b6fb173511ab9b026efa77a6f;hb=55c768d7e45babb300b5010463ba3196a68f1bbe;hp=0000000000000000000000000000000000000000;hpb=15212e44902f25536f6e2de4bec4cedcd9a9804d;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/ground/relocation/gr_isi_tl.ma b/matita/matita/contribs/lambdadelta/ground/relocation/gr_isi_tl.ma
new file mode 100644
index 000000000..4a80d36e4
--- /dev/null
+++ b/matita/matita/contribs/lambdadelta/ground/relocation/gr_isi_tl.ma
@@ -0,0 +1,28 @@
+(**************************************************************************)
+(*       ___                                                              *)
+(*      ||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 "ground/relocation/gr_tl.ma".
+include "ground/relocation/gr_isi.ma".
+
+(* IDENTITY CONDITION FOR GENERIC RELOCATION MAPS ***********************************************************)
+
+(* Properties with tail *****************************************************)
+
+(*** isid_tl *)
+lemma gr_isi_tl (f): 𝐈❪f❫ → 𝐈❪⫱f❫.
+#f cases (gr_map_split_tl f) * #H
+[ /2 width=3 by gr_isi_inv_push/
+| elim (gr_isi_inv_next … H) -H //
+]
+qed.