X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambda_delta%2FBasic_2%2Funfold%2Ftpss_lift.ma;h=748efd82766d723abace4c56ecba452d17ca97ba;hb=13a37618a5cebc5e0088a7da213f1de033d281db;hp=f28ff38960a2c19a42a0691d0fcbe3a431fa1c7f;hpb=55dc00c1c44cc21c7ae179cb9df03e7446002c46;p=helm.git

diff --git a/matita/matita/contribs/lambda_delta/Basic_2/unfold/tpss_lift.ma b/matita/matita/contribs/lambda_delta/Basic_2/unfold/tpss_lift.ma
index f28ff3896..748efd827 100644
--- a/matita/matita/contribs/lambda_delta/Basic_2/unfold/tpss_lift.ma
+++ b/matita/matita/contribs/lambda_delta/Basic_2/unfold/tpss_lift.ma
@@ -12,8 +12,8 @@
 (*                                                                        *)
 (**************************************************************************)
 
-include "Basic-2/substitution/tps_lift.ma".
-include "Basic-2/unfold/tpss.ma".
+include "Basic_2/substitution/tps_lift.ma".
+include "Basic_2/unfold/tpss.ma".
 
 (* PARTIAL UNFOLD ON TERMS **************************************************)
 
@@ -21,111 +21,146 @@ include "Basic-2/unfold/tpss.ma".
 
 lemma tpss_subst: ∀L,K,V,U1,i,d,e.
                   d ≤ i → i < d + e →
-                  ↓[0, i] L ≡ K. 𝕓{Abbr} V → K ⊢ V [0, d + e - i - 1] ≫* U1 →
-                  ∀U2. ↑[0, i + 1] U1 ≡ U2 → L ⊢ #i [d, e] ≫* U2.
-#L #K #V #U1 #i #d #e #Hdi #Hide #HLK #H @(tpss_ind … H) -H U1
-[ /3/
+                  ⇩[0, i] L ≡ K. ⓓV → K ⊢ V [0, d + e - i - 1] ▶* U1 →
+                  ∀U2. ⇧[0, i + 1] U1 ≡ U2 → L ⊢ #i [d, e] ▶* U2.
+#L #K #V #U1 #i #d #e #Hdi #Hide #HLK #H @(tpss_ind … H) -U1
+[ /3 width=4/
 | #U #U1 #_ #HU1 #IHU #U2 #HU12
   elim (lift_total U 0 (i+1)) #U0 #HU0
   lapply (IHU … HU0) -IHU #H
-  lapply (drop_fwd_drop2 … HLK) -HLK #HLK
-  lapply (tps_lift_ge … HU1 … HLK HU0 HU12 ?) -HU1 HLK HU0 HU12 // normalize #HU02
-  lapply (tps_weak … HU02 d e ? ?) -HU02 [ >arith_i2 // | /2/ | /2/ ]
+  lapply (ldrop_fwd_ldrop2 … HLK) -HLK #HLK
+  lapply (tps_lift_ge … HU1 … HLK HU0 HU12 ?) -HU1 -HLK -HU0 -HU12 // normalize #HU02
+  lapply (tps_weak … HU02 d e ? ?) -HU02 [ >minus_plus >commutative_plus /2 width=1/ | /2 width=1/ | /2 width=3/ ]
 ]
 qed.
 
 (* Advanced inverion lemmas *************************************************)
 
-lemma tpss_inv_atom1: ∀L,T2,I,d,e. L ⊢ 𝕒{I} [d, e] ≫* T2 →
-                      T2 = 𝕒{I} ∨
+lemma tpss_inv_atom1: ∀L,T2,I,d,e. L ⊢ ⓪{I} [d, e] ▶* T2 →
+                      T2 = ⓪{I} ∨
                       ∃∃K,V1,V2,i. d ≤ i & i < d + e &
-                                   ↓[O, i] L ≡ K. 𝕓{Abbr} V1 &
-                                   K ⊢ V1 [0, d + e - i - 1] ≫* V2 &
-                                   ↑[O, i + 1] V2 ≡ T2 &
+                                   ⇩[O, i] L ≡ K. ⓓV1 &
+                                   K ⊢ V1 [0, d + e - i - 1] ▶* V2 &
+                                   ⇧[O, i + 1] V2 ≡ T2 &
                                    I = LRef i.
-#L #T2 #I #d #e #H @(tpss_ind … H) -H T2
-[ /2/
+#L #T2 #I #d #e #H @(tpss_ind … H) -T2
+[ /2 width=1/
 | #T #T2 #_ #HT2 *
-  [ #H destruct -T;
-    elim (tps_inv_atom1 … HT2) -HT2 [ /2/ | * /3 width=10/ ]
+  [ #H destruct
+    elim (tps_inv_atom1 … HT2) -HT2 [ /2 width=1/ | * /3 width=10/ ]
   | * #K #V1 #V #i #Hdi #Hide #HLK #HV1 #HVT #HI
-    lapply (drop_fwd_drop2 … HLK) #H
-    elim (tps_inv_lift1_up … HT2 … H … HVT ? ? ?) normalize -HT2 H HVT [2,3,4: /2/ ] #V2 <minus_plus #HV2 #HVT2
-    @or_intror @(ex6_4_intro … Hdi Hide HLK … HVT2 HI) /2/ (**) (* /4 width=10/ is too slow *)
+    lapply (ldrop_fwd_ldrop2 … HLK) #H
+    elim (tps_inv_lift1_up … HT2 … H … HVT ? ? ?) normalize -HT2 -H -HVT [2,3,4: /2 width=1/ ] #V2 <minus_plus #HV2 #HVT2
+    @or_intror @(ex6_4_intro … Hdi Hide HLK … HVT2 HI) /2 width=3/ (**) (* /4 width=10/ is too slow *)
   ]
 ]
-qed.
+qed-.
 
-lemma tpss_inv_lref1: ∀L,T2,i,d,e. L ⊢ #i [d, e] ≫* T2 →
+lemma tpss_inv_lref1: ∀L,T2,i,d,e. L ⊢ #i [d, e] ▶* T2 →
                       T2 = #i ∨
                       ∃∃K,V1,V2. d ≤ i & i < d + e &
-                                 ↓[O, i] L ≡ K. 𝕓{Abbr} V1 &
-                                 K ⊢ V1 [0, d + e - i - 1] ≫* V2 &
-                                 ↑[O, i + 1] V2 ≡ T2.
+                                 ⇩[O, i] L ≡ K. ⓓV1 &
+                                 K ⊢ V1 [0, d + e - i - 1] ▶* V2 &
+                                 ⇧[O, i + 1] V2 ≡ T2.
 #L #T2 #i #d #e #H
-elim (tpss_inv_atom1 … H) -H /2/
-* #K #V1 #V2 #j #Hdj #Hjde #HLK #HV12 #HVT2 #H destruct -i /3 width=6/
-qed.
+elim (tpss_inv_atom1 … H) -H /2 width=1/
+* #K #V1 #V2 #j #Hdj #Hjde #HLK #HV12 #HVT2 #H destruct /3 width=6/
+qed-.
 
-lemma tpss_inv_refl_SO2: ∀L,T1,T2,d. L ⊢ T1 [d, 1] ≫* T2 →
-                         ∀K,V. ↓[0, d] L ≡ K. 𝕓{Abst} V → T1 = T2.
-#L #T1 #T2 #d #H #K #V #HLK @(tpss_ind … H) -H T2 //
+lemma tpss_inv_refl_SO2: ∀L,T1,T2,d. L ⊢ T1 [d, 1] ▶* T2 →
+                         ∀K,V. ⇩[0, d] L ≡ K. ⓛV → T1 = T2.
+#L #T1 #T2 #d #H #K #V #HLK @(tpss_ind … H) -T2 //
 #T #T2 #_ #HT2 #IHT <(tps_inv_refl_SO2 … HT2 … HLK) //
-qed.
+qed-.
 
 (* Relocation properties ****************************************************)
 
-lemma tpss_lift_le: ∀K,T1,T2,dt,et. K ⊢ T1 [dt, et] ≫* T2 →
-                    ∀L,U1,d,e. dt + et ≤ d → ↓[d, e] L ≡ K →
-                    ↑[d, e] T1 ≡ U1 → ∀U2. ↑[d, e] T2 ≡ U2 →
-                    L ⊢ U1 [dt, et] ≫* U2.
-#K #T1 #T2 #dt #et #H #L #U1 #d #e #Hdetd #HLK #HTU1 @(tpss_ind … H) -H T2
+lemma tpss_lift_le: ∀K,T1,T2,dt,et. K ⊢ T1 [dt, et] ▶* T2 →
+                    ∀L,U1,d,e. dt + et ≤ d → ⇩[d, e] L ≡ K →
+                    ⇧[d, e] T1 ≡ U1 → ∀U2. ⇧[d, e] T2 ≡ U2 →
+                    L ⊢ U1 [dt, et] ▶* U2.
+#K #T1 #T2 #dt #et #H #L #U1 #d #e #Hdetd #HLK #HTU1 @(tpss_ind … H) -T2
+[ #U2 #H >(lift_mono … HTU1 … H) -H //
+| -HTU1 #T #T2 #_ #HT2 #IHT #U2 #HTU2
+  elim (lift_total T d e) #U #HTU
+  lapply (IHT … HTU) -IHT #HU1
+  lapply (tps_lift_le … HT2 … HLK HTU HTU2 ?) -HT2 -HLK -HTU -HTU2 // /2 width=3/
+]
+qed.
+
+lemma tpss_lift_be: ∀K,T1,T2,dt,et. K ⊢ T1 [dt, et] ▶* T2 →
+                    ∀L,U1,d,e. dt ≤ d → d ≤ dt + et →
+                    ⇩[d, e] L ≡ K → ⇧[d, e] T1 ≡ U1 →
+                    ∀U2. ⇧[d, e] T2 ≡ U2 → L ⊢ U1 [dt, et + e] ▶* U2.
+#K #T1 #T2 #dt #et #H #L #U1 #d #e #Hdtd #Hddet #HLK #HTU1 @(tpss_ind … H) -T2
 [ #U2 #H >(lift_mono … HTU1 … H) -H //
 | -HTU1 #T #T2 #_ #HT2 #IHT #U2 #HTU2
   elim (lift_total T d e) #U #HTU
   lapply (IHT … HTU) -IHT #HU1
-  lapply (tps_lift_le … HT2 … HLK HTU HTU2 ?) -HT2 HLK HTU HTU2 /2/
+  lapply (tps_lift_be … HT2 … HLK HTU HTU2 ? ?) -HT2 -HLK -HTU -HTU2 // /2 width=3/
 ]
 qed.
 
-lemma tpss_lift_ge: ∀K,T1,T2,dt,et. K ⊢ T1 [dt, et] ≫* T2 →
-                    ∀L,U1,d,e. d ≤ dt → ↓[d, e] L ≡ K →
-                    ↑[d, e] T1 ≡ U1 → ∀U2. ↑[d, e] T2 ≡ U2 →
-                    L ⊢ U1 [dt + e, et] ≫* U2.
-#K #T1 #T2 #dt #et #H #L #U1 #d #e #Hddt #HLK #HTU1 @(tpss_ind … H) -H T2
+lemma tpss_lift_ge: ∀K,T1,T2,dt,et. K ⊢ T1 [dt, et] ▶* T2 →
+                    ∀L,U1,d,e. d ≤ dt → ⇩[d, e] L ≡ K →
+                    ⇧[d, e] T1 ≡ U1 → ∀U2. ⇧[d, e] T2 ≡ U2 →
+                    L ⊢ U1 [dt + e, et] ▶* U2.
+#K #T1 #T2 #dt #et #H #L #U1 #d #e #Hddt #HLK #HTU1 @(tpss_ind … H) -T2
 [ #U2 #H >(lift_mono … HTU1 … H) -H //
 | -HTU1 #T #T2 #_ #HT2 #IHT #U2 #HTU2
   elim (lift_total T d e) #U #HTU
   lapply (IHT … HTU) -IHT #HU1
-  lapply (tps_lift_ge … HT2 … HLK HTU HTU2 ?) -HT2 HLK HTU HTU2 /2/
+  lapply (tps_lift_ge … HT2 … HLK HTU HTU2 ?) -HT2 -HLK -HTU -HTU2 // /2 width=3/
 ]
 qed.
 
-lemma tpss_inv_lift1_le: ∀L,U1,U2,dt,et. L ⊢ U1 [dt, et] ≫* U2 →
-                         ∀K,d,e. ↓[d, e] L ≡ K → ∀T1. ↑[d, e] T1 ≡ U1 →
+lemma tpss_inv_lift1_le: ∀L,U1,U2,dt,et. L ⊢ U1 [dt, et] ▶* U2 →
+                         ∀K,d,e. ⇩[d, e] L ≡ K → ∀T1. ⇧[d, e] T1 ≡ U1 →
                          dt + et ≤ d →
-                         ∃∃T2. K ⊢ T1 [dt, et] ≫* T2 & ↑[d, e] T2 ≡ U2.
-#L #U1 #U2 #dt #et #H #K #d #e #HLK #T1 #HTU1 #Hdetd @(tpss_ind … H) -H U2
-[ /2/
+                         ∃∃T2. K ⊢ T1 [dt, et] ▶* T2 & ⇧[d, e] T2 ≡ U2.
+#L #U1 #U2 #dt #et #H #K #d #e #HLK #T1 #HTU1 #Hdetd @(tpss_ind … H) -U2
+[ /2 width=3/
+| -HTU1 #U #U2 #_ #HU2 * #T #HT1 #HTU
+  elim (tps_inv_lift1_le … HU2 … HLK … HTU ?) -HU2 -HLK -HTU // /3 width=3/
+]
+qed.
+
+lemma tpss_inv_lift1_be: ∀L,U1,U2,dt,et. L ⊢ U1 [dt, et] ▶* U2 →
+                         ∀K,d,e. ⇩[d, e] L ≡ K → ∀T1. ⇧[d, e] T1 ≡ U1 →
+                         dt ≤ d → d + e ≤ dt + et →
+                         ∃∃T2. K ⊢ T1 [dt, et - e] ▶* T2 & ⇧[d, e] T2 ≡ U2.
+#L #U1 #U2 #dt #et #H #K #d #e #HLK #T1 #HTU1 #Hdtd #Hdedet @(tpss_ind … H) -U2
+[ /2 width=3/
 | -HTU1 #U #U2 #_ #HU2 * #T #HT1 #HTU
-  elim (tps_inv_lift1_le … HU2 … HLK … HTU ?) -HU2 HLK HTU /3/
+  elim (tps_inv_lift1_be … HU2 … HLK … HTU ? ?) -HU2 -HLK -HTU // /3 width=3/
 ]
 qed.
 
-lemma tpss_inv_lift1_ge: ∀L,U1,U2,dt,et. L ⊢ U1 [dt, et] ≫* U2 →
-                         ∀K,d,e. ↓[d, e] L ≡ K → ∀T1. ↑[d, e] T1 ≡ U1 →
+lemma tpss_inv_lift1_ge: ∀L,U1,U2,dt,et. L ⊢ U1 [dt, et] ▶* U2 →
+                         ∀K,d,e. ⇩[d, e] L ≡ K → ∀T1. ⇧[d, e] T1 ≡ U1 →
                          d + e ≤ dt →
-                         ∃∃T2. K ⊢ T1 [dt - e, et] ≫* T2 & ↑[d, e] T2 ≡ U2.
-#L #U1 #U2 #dt #et #H #K #d #e #HLK #T1 #HTU1 #Hdedt @(tpss_ind … H) -H U2
-[ /2/
+                         ∃∃T2. K ⊢ T1 [dt - e, et] ▶* T2 & ⇧[d, e] T2 ≡ U2.
+#L #U1 #U2 #dt #et #H #K #d #e #HLK #T1 #HTU1 #Hdedt @(tpss_ind … H) -U2
+[ /2 width=3/
 | -HTU1 #U #U2 #_ #HU2 * #T #HT1 #HTU
-  elim (tps_inv_lift1_ge … HU2 … HLK … HTU ?) -HU2 HLK HTU /3/
+  elim (tps_inv_lift1_ge … HU2 … HLK … HTU ?) -HU2 -HLK -HTU // /3 width=3/
 ]
 qed.
 
 lemma tpss_inv_lift1_eq: ∀L,U1,U2,d,e.
-                         L ⊢ U1 [d, e] ≫* U2 → ∀T1. ↑[d, e] T1 ≡ U1 → U1 = U2.
-#L #U1 #U2 #d #e #H #T1 #HTU1 @(tpss_ind … H) -H U2 //
-#U #U2 #_ #HU2 #IHU destruct -U1
-<(tps_inv_lift1_eq … HU2 … HTU1) -HU2 HTU1 //
+                         L ⊢ U1 [d, e] ▶* U2 → ∀T1. ⇧[d, e] T1 ≡ U1 → U1 = U2.
+#L #U1 #U2 #d #e #H #T1 #HTU1 @(tpss_ind … H) -U2 //
+#U #U2 #_ #HU2 #IHU destruct
+<(tps_inv_lift1_eq … HU2 … HTU1) -HU2 -HTU1 //
+qed.
+
+lemma tpss_inv_lift1_be_up: ∀L,U1,U2,dt,et. L ⊢ U1 [dt, et] ▶* U2 →
+                            ∀K,d,e. ⇩[d, e] L ≡ K → ∀T1. ⇧[d, e] T1 ≡ U1 →
+                            dt ≤ d → dt + et ≤ d + e →
+                            ∃∃T2. K ⊢ T1 [dt, d - dt] ▶* T2 & ⇧[d, e] T2 ≡ U2.
+#L #U1 #U2 #dt #et #H #K #d #e #HLK #T1 #HTU1 #Hdtd #Hdetde @(tpss_ind … H) -U2
+[ /2 width=3/
+| -HTU1 #U #U2 #_ #HU2 * #T #HT1 #HTU
+  elim (tps_inv_lift1_be_up … HU2 … HLK … HTU ? ?) -HU2 -HLK -HTU // /3 width=3/
+]
 qed.