X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_transition%2Fcpg_drops.ma;h=295cc229125f35c25126ff498229fc7e1458abb4;hb=e8971d3db8935436e6dddc27fe1ae168c7f3b315;hp=6c9fdfd22190e36447009acb8ebb9abfd6e4b55c;hpb=138e01310a2334cd531819122c794d72d14c6e8c;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpg_drops.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpg_drops.ma
index 6c9fdfd22..295cc2291 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpg_drops.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpg_drops.ma
@@ -26,7 +26,7 @@ lemma cpg_delta_drops: ∀Rt,c,h,G,K,V,V2,i,L,T2. ⬇*[i] L ≡ K.ⓓV → ⦃G,
 #Rt #c #h #G #K #V #V2 #i elim i -i
 [ #L #T2 #HLK lapply (drops_fwd_isid … HLK ?) // #H destruct /3 width=3 by cpg_delta/
 | #i #IH #L0 #T0 #H0 #HV2 #HVT2
-  elim (drops_inv_succ … H0) -H0 #I #L #V0 #HLK #H destruct
+  elim (drops_inv_succ … H0) -H0 #I #L #HLK #H destruct
   elim (lifts_split_trans … HVT2 (𝐔❴⫯i❵) (𝐔❴1❵) ?) -HVT2 /3 width=3 by cpg_lref/
 ]
 qed.
@@ -36,7 +36,7 @@ lemma cpg_ell_drops: ∀Rt,c,h,G,K,V,V2,i,L,T2. ⬇*[i] L ≡ K.ⓛV → ⦃G, K
 #Rt #c #h #G #K #V #V2 #i elim i -i
 [ #L #T2 #HLK lapply (drops_fwd_isid … HLK ?) // #H destruct /3 width=3 by cpg_ell/
 | #i #IH #L0 #T0 #H0 #HV2 #HVT2
-  elim (drops_inv_succ … H0) -H0 #I #L #V0 #HLK #H destruct
+  elim (drops_inv_succ … H0) -H0 #I #L #HLK #H destruct
   elim (lifts_split_trans … HVT2 (𝐔❴⫯i❵) (𝐔❴1❵) ?) -HVT2 /3 width=3 by cpg_lref/
 ]
 qed.
@@ -53,7 +53,7 @@ lemma cpg_inv_lref1_drops: ∀Rt,c,h,G,i,L,T2. ⦃G, L⦄ ⊢ #i ⬈[Rt,c, h] T2
 [ #L #T2 #H elim (cpg_inv_zero1 … H) -H * /3 width=1 by or3_intro0, conj/
   /4 width=8 by drops_refl, ex4_4_intro, or3_intro2, or3_intro1/
 | #i #IH #L #T2 #H elim (cpg_inv_lref1 … H) -H * /3 width=1 by or3_intro0, conj/
-  #I #K #V #V2 #H #HVT2 #H0 destruct elim (IH … H) -IH -H
+  #I #K #V2 #H #HVT2 #H0 destruct elim (IH … H) -IH -H
   [ * #H1 #H2 destruct lapply (lifts_inv_lref1_uni … HVT2) -HVT2 #H destruct /3 width=1 by or3_intro0, conj/ ] *
   #cV #L #W #W2 #HKL #HW2 #HWV2 #H destruct
   lapply (lifts_trans … HWV2 … HVT2 ??) -V2
@@ -81,9 +81,10 @@ qed-.
 (* Properties with generic slicing for local environments *******************)
 
 (* Note: it should use drops_split_trans_pair2 *)
-lemma cpg_lifts: ∀Rt. reflexive … Rt → ∀c,h,G. d_liftable2 (cpg Rt h c G).
+lemma cpg_lifts_sn: ∀Rt. reflexive … Rt →
+                    ∀c,h,G. d_liftable2_sn … lifts (cpg Rt h c G).
 #Rt #HRt #c #h #G #K #T generalize in match c; -c
-@(fqup_wf_ind_eq … G K T) -G -K -T #G0 #K0 #T0 #IH #G #K * *
+@(fqup_wf_ind_eq (Ⓣ) … G K T) -G -K -T #G0 #K0 #T0 #IH #G #K * *
 [ #s #HG #HK #HT #c #X2 #H2 #b #f #L #HLK #X1 #H1 destruct -IH
   lapply (lifts_inv_sort1 … H1) -H1 #H destruct
   elim (cpg_inv_sort1 … H2) -H2 * #H1 #H2 destruct
@@ -96,7 +97,8 @@ lemma cpg_lifts: ∀Rt. reflexive … Rt → ∀c,h,G. d_liftable2 (cpg Rt h c G
   lapply (drops_trans … HLK … HK0 ??) -HLK [3,6: |*: // ] #H
   elim (drops_split_trans … H) -H [1,6: |*: /2 width=6 by after_uni_dx/ ] #Y #HL0 #HY
   lapply (drops_tls_at … Hf … HY) -HY #HY
-  elim (drops_inv_skip2 … HY) -HY #L0 #W #HLK0 #HVW #H destruct
+  elim (drops_inv_skip2 … HY) -HY #Z #L0 #HLK0 #HZ #H destruct
+  elim (liftsb_inv_pair_sn … HZ) -HZ #W #HVW #H destruct
   elim (IH … HV2 … HLK0 … HVW) -IH /2 width=2 by fqup_lref/ -K -K0 -V #W2 #HVW2 #HW2
   elim (lifts_total W2 (𝐔❴⫯i2❵)) #U2 #HWU2
   lapply (lifts_trans … HVW2 … HWU2 ??) -HVW2 [3,6: |*: // ] #HVU2
@@ -111,10 +113,10 @@ lemma cpg_lifts: ∀Rt. reflexive … Rt → ∀c,h,G. d_liftable2 (cpg Rt h c G
   elim (cpg_inv_bind1 … H2) -H2 *
   [ #cV #cT #V2 #T2 #HV12 #HT12 #H1 #H2 destruct
     elim (IH … HV12 … HLK … HVW1) -HV12 //
-    elim (IH … HT12 … HTU1) -IH -HT12 -HTU1 [ |*: /3 width=3 by drops_skip/ ]
+    elim (IH … HT12 … HTU1) -IH -HT12 -HTU1 [ |*: /3 width=3 by drops_skip, ext2_pair/ ]
     /3 width=5 by cpg_bind, lifts_bind, ex2_intro/
   | #cT #T2 #HT12 #HXT2 #H1 #H2 #H3 destruct
-    elim (IH … HT12 … HTU1) -IH -HT12 -HTU1 [ |*: /3 width=3 by drops_skip/ ] #U2 #HTU2 #HU12
+    elim (IH … HT12 … HTU1) -IH -HT12 -HTU1 [ |*: /3 width=3 by drops_skip, ext2_pair/ ] #U2 #HTU2 #HU12
     lapply (lifts_trans … HXT2 … HTU2 ??) -T2 [3: |*: // ] #HXU2
     elim (lifts_split_trans … HXU2 f (𝐔❴⫯O❵)) [2: /2 width=1 by after_uni_one_dx/ ]
     /3 width=5 by cpg_zeta, ex2_intro/
@@ -130,13 +132,13 @@ lemma cpg_lifts: ∀Rt. reflexive … Rt → ∀c,h,G. d_liftable2 (cpg Rt h c G
       elim (lifts_inv_bind1 … HTU1) -HTU1 #Z1 #U0 #HYZ1 #HTU1 #H destruct
       elim (IH … HV12 … HLK … HVW1) -HV12 -HVW1 //
       elim (IH … HY12 … HLK … HYZ1) -HY12 //
-      elim (IH … HT12 … HTU1) -IH -HT12 -HTU1 [ |*: /3 width=3 by drops_skip/ ]
+      elim (IH … HT12 … HTU1) -IH -HT12 -HTU1 [ |*: /3 width=3 by drops_skip, ext2_pair/ ]
       /4 width=7 by cpg_beta, lifts_bind, lifts_flat, ex2_intro/
     | #cV #cY #cT #a #V2 #V20 #Y1 #Y2 #T0 #T2 #HV12 #HV20 #HY12 #HT12 #H1 #H2 #H3 destruct
       elim (lifts_inv_bind1 … HTU1) -HTU1 #Z1 #U0 #HYZ1 #HTU1 #H destruct
       elim (IH … HV12 … HLK … HVW1) -HV12 -HVW1 // #W2 #HVW2 #HW12
       elim (IH … HY12 … HLK … HYZ1) -HY12 //
-      elim (IH … HT12 … HTU1) -IH -HT12 -HTU1 [ |*: /3 width=3 by drops_skip/ ]
+      elim (IH … HT12 … HTU1) -IH -HT12 -HTU1 [ |*: /3 width=3 by drops_skip, ext2_pair/ ]
       elim (lifts_total W2 (𝐔❴1❵)) #W20 #HW20
       lapply (lifts_trans … HVW2 … HW20 ??) -HVW2 [3: |*: // ] #H
       lapply (lifts_conf … HV20 … H (↑f) ?) -V2 /2 width=3 by after_uni_one_sn/
@@ -158,11 +160,16 @@ lemma cpg_lifts: ∀Rt. reflexive … Rt → ∀c,h,G. d_liftable2 (cpg Rt h c G
 ]
 qed-.
 
+lemma cpg_lifts_bi: ∀Rt. reflexive … Rt →
+                    ∀c,h,G. d_liftable2_bi … lifts (cpg Rt h c G).
+/3 width=12 by cpg_lifts_sn, d_liftable2_sn_bi, lifts_mono/ qed-.
+
 (* Inversion lemmas with generic slicing for local environments *************)
 
-lemma cpg_inv_lifts1: ∀Rt. reflexive … Rt → ∀c,h,G. d_deliftable2_sn (cpg Rt h c G).
+lemma cpg_inv_lifts_sn: ∀Rt. reflexive … Rt →
+                        ∀c,h,G. d_deliftable2_sn … lifts (cpg Rt h c G).
 #Rt #HRt #c #h #G #L #U generalize in match c; -c
-@(fqup_wf_ind_eq … G L U) -G -L -U #G0 #L0 #U0 #IH #G #L * *
+@(fqup_wf_ind_eq (Ⓣ) … G L U) -G -L -U #G0 #L0 #U0 #IH #G #L * *
 [ #s #HG #HL #HU #c #X2 #H2 #b #f #K #HLK #X1 #H1 destruct -IH
   lapply (lifts_inv_sort2 … H1) -H1 #H destruct
   elim (cpg_inv_sort1 … H2) -H2 * #H1 #H2 destruct
@@ -175,7 +182,8 @@ lemma cpg_inv_lifts1: ∀Rt. reflexive … Rt → ∀c,h,G. d_deliftable2_sn (cp
   lapply (drops_split_div … HLK (𝐔❴i1❵) ???) -HLK [4,8: * |*: // ] #Y0 #HK0 #HLY0
   lapply (drops_conf … HL0 … HLY0 ??) -HLY0 [3,6: |*: /2 width=6 by after_uni_dx/ ] #HLY0
   lapply (drops_tls_at … Hf … HLY0) -HLY0 #HLY0
-  elim (drops_inv_skip1 … HLY0) -HLY0 #K0 #V #HLK0 #HVW #H destruct
+  elim (drops_inv_skip1 … HLY0) -HLY0 #Z #K0 #HLK0 #HZ #H destruct
+  elim (liftsb_inv_pair_dx … HZ) -HZ #V #HVW #H destruct
   elim (IH … HW2 … HLK0 … HVW) -IH /2 width=2 by fqup_lref/ -L -L0 -W #V2 #HVW2 #HV2
   lapply (lifts_trans … HVW2 … HWU2 ??) -W2 [3,6: |*: // ] #HVU2
   elim (lifts_split_trans … HVU2 ? f) -HVU2 [1,4: |*: /2 width=4 by after_uni_succ_sn/ ]
@@ -189,10 +197,10 @@ lemma cpg_inv_lifts1: ∀Rt. reflexive … Rt → ∀c,h,G. d_deliftable2_sn (cp
   elim (cpg_inv_bind1 … H2) -H2 *
   [ #cW #cU #W2 #U2 #HW12 #HU12 #H1 #H2 destruct
     elim (IH … HW12 … HLK … HVW1) -HW12 //
-    elim (IH … HU12 … HTU1) -IH -HU12 -HTU1 [ |*: /3 width=3 by drops_skip/ ]
+    elim (IH … HU12 … HTU1) -IH -HU12 -HTU1 [ |*: /3 width=3 by drops_skip, ext2_pair/ ]
     /3 width=5 by cpg_bind, lifts_bind, ex2_intro/
   | #cU #U2 #HU12 #HXU2 #H1 #H2 #H3 destruct
-    elim (IH … HU12 … HTU1) -IH -HU12 -HTU1 [ |*: /3 width=3 by drops_skip/ ] #T2 #HTU2 #HT12
+    elim (IH … HU12 … HTU1) -IH -HU12 -HTU1 [ |*: /3 width=3 by drops_skip, ext2_pair/ ] #T2 #HTU2 #HT12
     elim (lifts_div4_one … HTU2 … HXU2) -U2 /3 width=5 by cpg_zeta, ex2_intro/
   ]
 | * #W1 #U1 #HG #HL #HU #c #X2 #H2 #b #f #K #HLK #X1 #H1 destruct
@@ -206,13 +214,13 @@ lemma cpg_inv_lifts1: ∀Rt. reflexive … Rt → ∀c,h,G. d_deliftable2_sn (cp
       elim (lifts_inv_bind2 … HTU1) -HTU1 #Y1 #T0 #HYZ1 #HTU1 #H destruct
       elim (IH … HW12 … HLK … HVW1) -HW12 -HVW1 //
       elim (IH … HZ12 … HLK … HYZ1) -HZ12 //
-      elim (IH … HU12 … HTU1) -IH -HU12 -HTU1 [ |*: /3 width=3 by drops_skip/ ]
+      elim (IH … HU12 … HTU1) -IH -HU12 -HTU1 [ |*: /3 width=3 by drops_skip, ext2_pair/ ]
       /4 width=7 by cpg_beta, lifts_bind, lifts_flat, ex2_intro/
     | #cW #cZ #cU #a #W2 #W20 #Z1 #Z2 #U0 #U2 #HW12 #HW20 #HZ12 #HU12 #H1 #H2 #H3 destruct
       elim (lifts_inv_bind2 … HTU1) -HTU1 #Y1 #T0 #HYZ1 #HTU1 #H destruct
       elim (IH … HW12 … HLK … HVW1) -HW12 -HVW1 // #V2 #HVW2 #HV12
       elim (IH … HZ12 … HLK … HYZ1) -HZ12 //
-      elim (IH … HU12 … HTU1) -IH -HU12 -HTU1 [ |*: /3 width=3 by drops_skip/ ]
+      elim (IH … HU12 … HTU1) -IH -HU12 -HTU1 [ |*: /3 width=3 by drops_skip, ext2_pair/ ]
       lapply (lifts_trans … HVW2 … HW20 ??) -W2 [3: |*: // ] #H
       elim (lifts_split_trans … H ? (↑f)) -H [ |*: /2 width=3 by after_uni_one_sn/ ]
       /4 width=9 by cpg_theta, lifts_bind, lifts_flat, ex2_intro/
@@ -232,3 +240,7 @@ lemma cpg_inv_lifts1: ∀Rt. reflexive … Rt → ∀c,h,G. d_deliftable2_sn (cp
   ]
 ]
 qed-.
+
+lemma cpg_inv_lifts_bi: ∀Rt. reflexive … Rt →
+                        ∀c,h,G. d_deliftable2_bi … lifts (cpg Rt h c G).
+/3 width=12 by cpg_inv_lifts_sn, d_deliftable2_sn_bi, lifts_inj/ qed-.