X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_transition%2Fcpr_drops.ma;h=2481e3c382b7a24c39de9437f199d3a9a7a51252;hp=9fd1974a1dd855c851cbb6157c80b4c84b683a05;hb=bd53c4e895203eb049e75434f638f26b5a161a2b;hpb=3b7b8afcb429a60d716d5226a5b6ab0d003228b1

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpr_drops.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpr_drops.ma
index 9fd1974a1..2481e3c38 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpr_drops.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpr_drops.ma
@@ -19,9 +19,9 @@ include "basic_2/rt_transition/cpm_drops.ma".
 (* Advanced inversion lemmas ************************************************)
 
 (* Basic_2A1: includes: cpr_inv_atom1 *)
-lemma cpr_inv_atom1_drops: ∀h,I,G,L,T2. ⦃G,L⦄ ⊢ ⓪{I} ➡[h] T2 →
-                           ∨∨ T2 = ⓪{I}
-                            | ∃∃K,V,V2,i. ⇩*[i] L ≘ K.ⓓV & ⦃G,K⦄ ⊢ V ➡[h] V2 &
+lemma cpr_inv_atom1_drops: ∀h,I,G,L,T2. ❪G,L❫ ⊢ ⓪[I] ➡[h] T2 →
+                           ∨∨ T2 = ⓪[I]
+                            | ∃∃K,V,V2,i. ⇩*[i] L ≘ K.ⓓV & ❪G,K❫ ⊢ V ➡[h] V2 &
                                           ⇧*[↑i] V2 ≘ T2 & I = LRef i.
 #h #I #G #L #T2 #H elim (cpm_inv_atom1_drops … H) -H *
 [ /2 width=1 by or_introl/
@@ -33,9 +33,9 @@ qed-.
 
 (* Basic_1: includes: pr0_gen_lref pr2_gen_lref *)
 (* Basic_2A1: includes: cpr_inv_lref1 *)
-lemma cpr_inv_lref1_drops: ∀h,G,L,T2,i. ⦃G,L⦄ ⊢ #i ➡[h] T2 →
+lemma cpr_inv_lref1_drops: ∀h,G,L,T2,i. ❪G,L❫ ⊢ #i ➡[h] T2 →
                            ∨∨ T2 = #i
-                            | ∃∃K,V,V2. ⇩*[i] L ≘ K. ⓓV & ⦃G,K⦄ ⊢ V ➡[h] V2 &
+                            | ∃∃K,V,V2. ⇩*[i] L ≘ K. ⓓV & ❪G,K❫ ⊢ V ➡[h] V2 &
                                         ⇧*[↑i] V2 ≘ T2.
 #h #G #L #T2 #i #H elim (cpm_inv_lref1_drops … H) -H *
 [ /2 width=1 by or_introl/