X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fdynamic%2Fnta_drops.ma;h=5aea37112458352ffde4bf012316034e6c276b76;hp=e054072d2baf80b37cb574db53631bd15851b852;hb=bd53c4e895203eb049e75434f638f26b5a161a2b;hpb=3b7b8afcb429a60d716d5226a5b6ab0d003228b1

diff --git a/matita/matita/contribs/lambdadelta/basic_2/dynamic/nta_drops.ma b/matita/matita/contribs/lambdadelta/basic_2/dynamic/nta_drops.ma
index e054072d2..5aea37112 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/dynamic/nta_drops.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/dynamic/nta_drops.ma
@@ -20,8 +20,8 @@ include "basic_2/dynamic/nta.ma".
 (* Advanced properties ******************************************************)
 
 lemma nta_ldef (h) (a) (G) (K):
-      ∀V,W. ⦃G,K⦄ ⊢ V :[h,a] W →
-      ∀U. ⇧*[1] W ≘ U → ⦃G,K.ⓓV⦄ ⊢ #0 :[h,a] U.
+      ∀V,W. ❪G,K❫ ⊢ V :[h,a] W →
+      ∀U. ⇧*[1] W ≘ U → ❪G,K.ⓓV❫ ⊢ #0 :[h,a] U.
 #h #a #G #K #V #W #H #U #HWU
 elim (cnv_inv_cast … H) -H #X #HW #HV #HWX #HVX
 lapply (cnv_lifts … HW (Ⓣ) … (K.ⓓV) … HWU) -HW
@@ -32,23 +32,23 @@ elim (cpms_lifts_sn … HWX … (Ⓣ) … (K.ⓓV) … HWU) -W
 qed.
 
 lemma nta_ldec_cnv (h) (a) (G) (K):
-      ∀W. ⦃G,K⦄ ⊢ W ![h,a] →
-      ∀U. ⇧*[1] W ≘ U → ⦃G,K.ⓛW⦄ ⊢ #0 :[h,a] U.
+      ∀W. ❪G,K❫ ⊢ W ![h,a] →
+      ∀U. ⇧*[1] W ≘ U → ❪G,K.ⓛW❫ ⊢ #0 :[h,a] U.
 #h #a #G #K #W #HW #U #HWU
 lapply (cnv_lifts … HW (Ⓣ) … (K.ⓛW) … HWU)
 /3 width=5 by cnv_zero, cnv_cast, cpms_ell, drops_refl, drops_drop/
 qed.
 
 lemma nta_lref (h) (a) (I) (G) (K):
-      ∀T,i. ⦃G,K⦄ ⊢ #i :[h,a] T →
-      ∀U. ⇧*[1] T ≘ U → ⦃G,K.ⓘ{I}⦄ ⊢ #(↑i) :[h,a] U.
+      ∀T,i. ❪G,K❫ ⊢ #i :[h,a] T →
+      ∀U. ⇧*[1] T ≘ U → ❪G,K.ⓘ[I]❫ ⊢ #(↑i) :[h,a] U.
 #h #a #I #G #K #T #i #H #U #HTU
 elim (cnv_inv_cast … H) -H #X #HT #Hi #HTX #H2
-lapply (cnv_lifts … HT (Ⓣ) … (K.ⓘ{I}) … HTU) -HT
+lapply (cnv_lifts … HT (Ⓣ) … (K.ⓘ[I]) … HTU) -HT
 [ /3 width=3 by drops_refl, drops_drop/ ] #HU
-lapply (cnv_lifts … Hi (Ⓣ) (𝐔❴1❵) (K.ⓘ{I}) ???) -Hi
+lapply (cnv_lifts … Hi (Ⓣ) (𝐔❨1❩) (K.ⓘ[I]) ???) -Hi
 [4:|*: /3 width=3 by drops_refl, drops_drop/ ] #Hi
-elim (cpms_lifts_sn … HTX … (Ⓣ) … (K.ⓘ{I}) … HTU) -T
+elim (cpms_lifts_sn … HTX … (Ⓣ) … (K.ⓘ[I]) … HTU) -T
 [| /3 width=3 by drops_refl, drops_drop/ ] #XU #HXU #HUXU
 /3 width=5 by cnv_cast, cpms_lref/
 qed.
@@ -75,17 +75,17 @@ lemma nta_lifts_bi (h) (a) (G): d_liftable2_bi … lifts (nta a h G).
 (* Basic_1: was by definition: ty3_abbr *)
 (* Basic_2A1: was by definition: nta_ldef ntaa_ldef *)
 lemma nta_ldef_drops (h) (a) (G) (K) (L) (i):
-      ∀V,W. ⦃G,K⦄ ⊢ V :[h,a] W →
-      ∀U. ⇧*[↑i] W ≘ U → ⇩*[i] L ≘ K.ⓓV → ⦃G,L⦄ ⊢ #i :[h,a] U.
+      ∀V,W. ❪G,K❫ ⊢ V :[h,a] W →
+      ∀U. ⇧*[↑i] W ≘ U → ⇩*[i] L ≘ K.ⓓV → ❪G,L❫ ⊢ #i :[h,a] U.
 #h #a #G #K #L #i #V #W #HVW #U #HWU #HLK
-elim (lifts_split_trans … HWU (𝐔❴1❵) (𝐔❴i❵)) [| // ] #X #HWX #HXU
+elim (lifts_split_trans … HWU (𝐔❨1❩) (𝐔❨i❩)) [| // ] #X #HWX #HXU
 /3 width=9 by nta_lifts_bi, nta_ldef/
 qed.
 
 lemma nta_ldec_drops_cnv (h) (a) (G) (K) (L) (i):
-      ∀W. ⦃G,K⦄ ⊢ W ![h,a] →
-      ∀U. ⇧*[↑i] W ≘ U → ⇩*[i] L ≘ K.ⓛW → ⦃G,L⦄ ⊢ #i :[h,a] U.
+      ∀W. ❪G,K❫ ⊢ W ![h,a] →
+      ∀U. ⇧*[↑i] W ≘ U → ⇩*[i] L ≘ K.ⓛW → ❪G,L❫ ⊢ #i :[h,a] U.
 #h #a #G #K #L #i #W #HW #U #HWU #HLK
-elim (lifts_split_trans … HWU (𝐔❴1❵) (𝐔❴i❵)) [| // ] #X #HWX #HXU
+elim (lifts_split_trans … HWU (𝐔❨1❩) (𝐔❨i❩)) [| // ] #X #HWX #HXU
 /3 width=9 by nta_lifts_bi, nta_ldec_cnv/
 qed.