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_basic.ma;h=661ee4ab55f09cf8a917fd658ef0592224c523f0;hp=e01180f09a106b3a468d0348036c016dbe08a1e7;hb=bd53c4e895203eb049e75434f638f26b5a161a2b;hpb=3b7b8afcb429a60d716d5226a5b6ab0d003228b1

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpr_drops_basic.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpr_drops_basic.ma
index e01180f09..661ee4ab5 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpr_drops_basic.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpr_drops_basic.ma
@@ -22,7 +22,7 @@ include "basic_2/rt_transition/cpr.ma".
 
 lemma cpr_subst (h) (G) (L) (U1) (i):
                 ∀K,V. ⇩*[i] L ≘ K.ⓓV →
-                ∃∃U2,T2. ⦃G,L⦄ ⊢ U1 ➡[h] U2 & ⇧[i,1] T2 ≘ U2.
+                ∃∃U2,T2. ❪G,L❫ ⊢ U1 ➡[h] U2 & ⇧[i,1] T2 ≘ U2.
 #h #G #L #U1 @(fqup_wf_ind_eq (Ⓣ) … G L U1) -G -L -U1
 #G0 #L0 #U0 #IH #G #L * *
 [ #s #HG #HL #HT #i #K #V #_ destruct -IH
@@ -30,8 +30,8 @@ lemma cpr_subst (h) (G) (L) (U1) (i):
 | #j #HG #HL #HT #i #K #V #HLK destruct -IH
   elim (lt_or_eq_or_gt i j) #Hij
   [ /3 width=4 by lifts_lref_ge_minus, cpr_refl, ex2_2_intro/
-  | elim (lifts_total V (𝐔❴↑i❵)) #U2 #HU2
-    elim (lifts_split_trans … HU2 (𝐔❴i❵) (𝐁❴i,1❵)) [2: @(after_basic_rc i 0) ]
+  | elim (lifts_total V (𝐔❨↑i❩)) #U2 #HU2
+    elim (lifts_split_trans … HU2 (𝐔❨i❩) (𝐁❨i,1❩)) [2: @(after_basic_rc i 0) ]
     /3 width=7 by cpm_delta_drops, ex2_2_intro/
   | /3 width=4 by lifts_lref_lt, cpr_refl, ex2_2_intro/
   ]
@@ -39,7 +39,7 @@ lemma cpr_subst (h) (G) (L) (U1) (i):
   /2 width=4 by lifts_gref, ex2_2_intro/
 | #p #J #W1 #U1 #HG #HL #HT #i #K #V #HLK destruct
   elim (IH G L W1 … HLK) [| // ] #W2 #V2 #HW12 #HVW2
-  elim (IH G (L.ⓑ{J}W1) U1 … (↑i)) [|*: /3 width=4 by drops_drop/ ] #U2 #T2 #HU12 #HTU2
+  elim (IH G (L.ⓑ[J]W1) U1 … (↑i)) [|*: /3 width=4 by drops_drop/ ] #U2 #T2 #HU12 #HTU2
   /3 width=9 by cpm_bind, lifts_bind, ex2_2_intro/
 | #J #W1 #U1 #HG #HL #HT #i #K #V #HLK destruct
   elim (IH G L W1 … HLK) [| // ] #W2 #V2 #HW12 #HVW2