X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_conversion%2Fcpc.ma;h=fcc70428cfcd7c431386283bddab3f86158de86e;hb=bd53c4e895203eb049e75434f638f26b5a161a2b;hp=156374e3fe96ef719d3750bc2cb5e8f4d9f6d3f7;hpb=747b42f3b9aac5487047f57742f1fcf05b56b57d;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_conversion/cpc.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_conversion/cpc.ma
index 156374e3f..fcc70428c 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_conversion/cpc.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_conversion/cpc.ma
@@ -18,7 +18,7 @@ include "basic_2/rt_transition/cpm.ma".
 (* CONTEXT-SENSITIVE PARALLEL R-CONVERSION FOR TERMS ************************)
 
 definition cpc: sh → relation4 genv lenv term term ≝
-                λh,G,L,T1,T2. ⦃G, L⦄ ⊢ T1 ➡[h] T2 ∨ ⦃G, L⦄ ⊢ T2 ➡[h] T1.
+                λh,G,L,T1,T2. ❪G,L❫ ⊢ T1 ➡[h] T2 ∨ ❪G,L❫ ⊢ T2 ➡[h] T1.
 
 interpretation
    "context-sensitive parallel r-conversion (term)"
@@ -35,7 +35,7 @@ qed-.
 
 (* Basic forward lemmas *****************************************************)
 
-lemma cpc_fwd_cpr: ∀h,G,L,T1,T2. ⦃G, L⦄ ⊢ T1 ⬌[h] T2 →
-                   ∃∃T. ⦃G, L⦄ ⊢ T1 ➡[h] T & ⦃G, L⦄ ⊢ T2 ➡[h] T.
+lemma cpc_fwd_cpr: ∀h,G,L,T1,T2. ❪G,L❫ ⊢ T1 ⬌[h] T2 →
+                   ∃∃T. ❪G,L❫ ⊢ T1 ➡[h] T & ❪G,L❫ ⊢ T2 ➡[h] T.
 #h #G #L #T1 #T2 * /2 width=3 by ex2_intro/
 qed-.