update in ground

[helm.git] / matita / matita / contribs / lambdadelta / ground / relocation / pr_isd_tl.ma

diff --git a/matita/matita/contribs/lambdadelta/ground/relocation/pr_isd_tl.ma b/matita/matita/contribs/lambdadelta/ground/relocation/pr_isd_tl.ma
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+(**************************************************************************)
+(*       ___                                                              *)
+(*      ||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/pr_tl.ma".
+include "ground/relocation/pr_isd.ma".
+
+(* DIVERGENCE CONDITION FOR PARTIAL RELOCATION MAPS *************************)
+
+(* Constructions with pr_tl *************************************************)
+
+(*** isdiv_tl *)
+lemma pr_isd_tl (f): 𝛀❪f❫ → 𝛀❪⫰f❫.
+#f cases (pr_map_split_tl f) * #H
+[ elim (pr_isd_inv_push … H) -H //
+| /2 width=3 by pr_isd_inv_next/
+]
+qed.