update in ground

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

diff --git a/matita/matita/contribs/lambdadelta/ground/relocation/tr_id_tls.ma b/matita/matita/contribs/lambdadelta/ground/relocation/tr_id_tls.ma
new file mode 100644 (file)
index 0000000..20906fe
--- /dev/null
+++ b/matita/matita/contribs/lambdadelta/ground/relocation/tr_id_tls.ma
@@ -0,0 +1,26 @@
+(**************************************************************************)
+(*       ___                                                              *)
+(*      ||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/lib/stream_tls.ma".
+include "ground/relocation/tr_id_hdtl.ma".
+
+(* IDENTITY ELEMENT FOR TOTAL RELOCATION MAPS *******************************)
+
+(* Constructions with stream_tls ********************************************)
+
+lemma tr_tls_id (n):
+      (𝐢) = ⇂*[n]𝐢.
+#n @(nat_ind_succ … n) -n //
+#n #IH <stream_tls_swap //
+qed.