update in basic_2

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / rt_computation / cprs_cpr.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/cprs_cpr.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/cprs_cpr.ma
new file mode 100644 (file)
index 0000000..91029fa
--- /dev/null
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/cprs_cpr.ma
@@ -0,0 +1,31 @@
+(**************************************************************************)
+(*       ___                                                              *)
+(*      ||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 "basic_2/rt_transition/cpr_cpr.ma".
+include "basic_2/rt_computation/cprs_ctc.ma".
+
+(* CONTEXT-SENSITIVE PARALLEL R-COMPUTATION FOR TERMS ***********************)
+
+(* Advanced properties with context-sensitive r-transition for terms ********)
+
+(* Basic_1: was: pr3_strip *)
+(* Basic_1: includes: pr1_strip *)
+lemma cprs_strip (h) (G) (L): confluent2 … (cpms h G L 0) (cpm h G L 0).
+#h #G #L #T0 #T1 #HT01 #T2 #HT02
+elim (TC_strip1 … T0 T1 … HT02) -HT02
+[ /3 width=3 by cprs_CTC, ex2_intro/ | skip
+| /2 width=1 by cprs_inv_CTC/
+| /2 width=3 by cpr_conf/
+]
+qed-.