X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fstatic_2%2Fstatic%2Frex.ma;h=45e9028d70ff7668af576eca059b5e9bb3fdbbd6;hp=d4c7271235d5ea5e7ae4d24d58c648f869110897;hb=98e786e1a6bd7b621e37ba7cd4098d4a0a6f8278;hpb=68b4f2490c12139c03760b39895619e63b0f38c9

diff --git a/matita/matita/contribs/lambdadelta/static_2/static/rex.ma b/matita/matita/contribs/lambdadelta/static_2/static/rex.ma
index d4c727123..45e9028d7 100644
--- a/matita/matita/contribs/lambdadelta/static_2/static/rex.ma
+++ b/matita/matita/contribs/lambdadelta/static_2/static/rex.ma
@@ -27,33 +27,49 @@ include "static_2/static/frees.ma".
 definition rex (R) (T): relation lenv ≝
                λL1,L2. ∃∃f. L1 ⊢ 𝐅+❪T❫ ≘ f & L1 ⪤[cext2 R,cfull,f] L2.
 
-interpretation "generic extension on referred entries (local environment)"
-   'Relation R T L1 L2 = (rex R T L1 L2).
-
-definition R_confluent2_rex: relation4 (relation3 lenv term term)
-                                       (relation3 lenv term term) … ≝
-                             λR1,R2,RP1,RP2.
-                             ∀L0,T0,T1. R1 L0 T0 T1 → ∀T2. R2 L0 T0 T2 →
-                             ∀L1. L0 ⪤[RP1,T0] L1 → ∀L2. L0 ⪤[RP2,T0] L2 →
-                             ∃∃T. R2 L1 T1 T & R1 L2 T2 T.
+interpretation
+  "generic extension on referred entries (local environment)"
+  'Relation R T L1 L2 = (rex R T L1 L2).
+
+definition R_confluent2_rex:
+           relation4 (relation3 lenv term term)
+                     (relation3 lenv term term) … ≝
+           λR1,R2,RP1,RP2.
+           ∀L0,T0,T1. R1 L0 T0 T1 → ∀T2. R2 L0 T0 T2 →
+           ∀L1. L0 ⪤[RP1,T0] L1 → ∀L2. L0 ⪤[RP2,T0] L2 →
+           ∃∃T. R2 L1 T1 T & R1 L2 T2 T.
+
+definition R_replace3_rex:
+           relation4 (relation3 lenv term term)
+                     (relation3 lenv term term) … ≝
+           λR1,R2,RP1,RP2.
+           ∀L0,T0,T1. R1 L0 T0 T1 → ∀T2. R2 L0 T0 T2 →
+           ∀L1. L0 ⪤[RP1,T0] L1 → ∀L2. L0 ⪤[RP2,T0] L2 →
+           ∀T. R2 L1 T1 T → R1 L2 T2 T.
+
+definition R_transitive_rex: relation3 ? (relation3 ?? term) … ≝
+           λR1,R2,R3.
+           ∀K1,K,V1. K1 ⪤[R1,V1] K →
+           ∀V. R1 K1 V1 V → ∀V2. R2 K V V2 → R3 K1 V1 V2.
+
+definition R_confluent1_rex: relation … ≝
+           λR1,R2.
+           ∀K1,K2,V1. K1 ⪤[R2,V1] K2 → ∀V2. R1 K1 V1 V2 → R1 K2 V1 V2.
 
 definition rex_confluent: relation … ≝
-                          λR1,R2.
-                          ∀K1,K,V1. K1 ⪤[R1,V1] K → ∀V. R1 K1 V1 V →
-                          ∀K2. K ⪤[R2,V] K2 → K ⪤[R2,V1] K2.
-
-definition rex_transitive: relation3 ? (relation3 ?? term) … ≝
-                           λR1,R2,R3.
-                           ∀K1,K,V1. K1 ⪤[R1,V1] K →
-                           ∀V. R1 K1 V1 V → ∀V2. R2 K V V2 → R3 K1 V1 V2.
+           λR1,R2.
+           ∀K1,K,V1. K1 ⪤[R1,V1] K → ∀V. R1 K1 V1 V →
+           ∀K2. K ⪤[R2,V] K2 → K ⪤[R2,V1] K2.
 
 (* Basic inversion lemmas ***************************************************)
 
-lemma rex_inv_atom_sn (R): ∀Y2,T. ⋆ ⪤[R,T] Y2 → Y2 = ⋆.
+lemma rex_inv_atom_sn (R):
+      ∀Y2,T. ⋆ ⪤[R,T] Y2 → Y2 = ⋆.
 #R #Y2 #T * /2 width=4 by sex_inv_atom1/
 qed-.
 
-lemma rex_inv_atom_dx (R): ∀Y1,T. Y1 ⪤[R,T] ⋆ → Y1 = ⋆.
+lemma rex_inv_atom_dx (R):
+      ∀Y1,T. Y1 ⪤[R,T] ⋆ → Y1 = ⋆.
 #R #I #Y1 * /2 width=4 by sex_inv_atom2/
 qed-.
 
@@ -64,7 +80,7 @@ lemma rex_inv_sort (R):
 #R * [ | #Y1 #I1 ] #Y2 #s * #f #H1 #H2
 [ lapply (sex_inv_atom1 … H2) -H2 /3 width=1 by or_introl, conj/
 | lapply (frees_inv_sort … H1) -H1 #Hf
-  elim (isid_inv_gen … Hf) -Hf #g #Hg #H destruct
+  elim (pr_isi_inv_gen … Hf) -Hf #g #Hg #H destruct
   elim (sex_inv_push1 … H2) -H2 #I2 #L2 #H12 #_ #H destruct
   /5 width=7 by frees_sort, ex3_4_intro, ex2_intro, or_intror/
 ]
@@ -72,11 +88,9 @@ qed-.
 
 lemma rex_inv_zero (R):
       ∀Y1,Y2. Y1 ⪤[R,#0] Y2 →
-      ∨∨ Y1 = ⋆ ∧ Y2 = ⋆
-       | ∃∃I,L1,L2,V1,V2. L1 ⪤[R,V1] L2 & R L1 V1 V2 &
-           Y1 = L1.ⓑ[I]V1 & Y2 = L2.ⓑ[I]V2
-       | ∃∃f,I,L1,L2. 𝐈❪f❫ & L1 ⪤[cext2 R,cfull,f] L2 &
-           Y1 = L1.ⓤ[I] & Y2 = L2.ⓤ[I].
+      ∨∨ ∧∧ Y1 = ⋆ & Y2 = ⋆
+       | ∃∃I,L1,L2,V1,V2. L1 ⪤[R,V1] L2 & R L1 V1 V2 & Y1 = L1.ⓑ[I]V1 & Y2 = L2.ⓑ[I]V2
+       | ∃∃f,I,L1,L2. 𝐈❪f❫ & L1 ⪤[cext2 R,cfull,f] L2 & Y1 = L1.ⓤ[I] & Y2 = L2.ⓤ[I].
 #R * [ | #Y1 * #I1 [ | #X ] ] #Y2 * #f #H1 #H2
 [ lapply (sex_inv_atom1 … H2) -H2 /3 width=1 by or3_intro0, conj/
 | elim (frees_inv_unit … H1) -H1 #g #HX #H destruct
@@ -108,7 +122,7 @@ lemma rex_inv_gref (R):
 #R * [ | #Y1 #I1 ] #Y2 #l * #f #H1 #H2
 [ lapply (sex_inv_atom1 … H2) -H2 /3 width=1 by or_introl, conj/
 | lapply (frees_inv_gref … H1) -H1 #Hf
-  elim (isid_inv_gen … Hf) -Hf #g #Hg #H destruct
+  elim (pr_isi_inv_gen … Hf) -Hf #g #Hg #H destruct
   elim (sex_inv_push1 … H2) -H2 #I2 #L2 #H12 #_ #H destruct
   /5 width=7 by frees_gref, ex3_4_intro, ex2_intro, or_intror/
 ]
@@ -119,7 +133,7 @@ lemma rex_inv_bind (R):
       ∀p,I,L1,L2,V1,V2,T. L1 ⪤[R,ⓑ[p,I]V1.T] L2 → R L1 V1 V2 →
       ∧∧ L1 ⪤[R,V1] L2 & L1.ⓑ[I]V1 ⪤[R,T] L2.ⓑ[I]V2.
 #R #p #I #L1 #L2 #V1 #V2 #T * #f #Hf #HL #HV elim (frees_inv_bind … Hf) -Hf
-/6 width=6 by sle_sex_trans, sex_inv_tl, ext2_pair, sor_inv_sle_dx, sor_inv_sle_sn, ex2_intro, conj/
+/6 width=6 by sle_sex_trans, sex_inv_tl, ext2_pair, pr_sor_inv_sle_dx, pr_sor_inv_sle_sn, ex2_intro, conj/
 qed-.
 
 (* Basic_2A1: uses: llpx_sn_inv_flat *)
@@ -127,7 +141,7 @@ lemma rex_inv_flat (R):
       ∀I,L1,L2,V,T. L1 ⪤[R,ⓕ[I]V.T] L2 →
       ∧∧ L1 ⪤[R,V] L2 & L1 ⪤[R,T] L2.
 #R #I #L1 #L2 #V #T * #f #Hf #HL elim (frees_inv_flat … Hf) -Hf
-/5 width=6 by sle_sex_trans, sor_inv_sle_dx, sor_inv_sle_sn, ex2_intro, conj/
+/5 width=6 by sle_sex_trans, pr_sor_inv_sle_dx, pr_sor_inv_sle_sn, ex2_intro, conj/
 qed-.
 
 (* Advanced inversion lemmas ************************************************)
@@ -237,10 +251,11 @@ elim (rex_inv_zero_pair_sn … H) -H #Y #X #HK12 #_ #H destruct //
 qed-.
 
 (* Basic_2A1: uses: llpx_sn_fwd_pair_sn llpx_sn_fwd_bind_sn llpx_sn_fwd_flat_sn *)
-lemma rex_fwd_pair_sn (R): ∀I,L1,L2,V,T. L1 ⪤[R,②[I]V.T] L2 → L1 ⪤[R,V] L2.
+lemma rex_fwd_pair_sn (R):
+      ∀I,L1,L2,V,T. L1 ⪤[R,②[I]V.T] L2 → L1 ⪤[R,V] L2.
 #R * [ #p ] #I #L1 #L2 #V #T * #f #Hf #HL
 [ elim (frees_inv_bind … Hf) | elim (frees_inv_flat … Hf) ] -Hf
-/4 width=6 by sle_sex_trans, sor_inv_sle_sn, ex2_intro/
+/4 width=6 by sle_sex_trans, pr_sor_inv_sle_sn, ex2_intro/
 qed-.
 
 (* Basic_2A1: uses: llpx_sn_fwd_bind_dx llpx_sn_fwd_bind_O_dx *)
@@ -251,21 +266,23 @@ lemma rex_fwd_bind_dx (R):
 qed-.
 
 (* Basic_2A1: uses: llpx_sn_fwd_flat_dx *)
-lemma rex_fwd_flat_dx (R): ∀I,L1,L2,V,T. L1 ⪤[R,ⓕ[I]V.T] L2 → L1 ⪤[R,T] L2.
+lemma rex_fwd_flat_dx (R):
+      ∀I,L1,L2,V,T. L1 ⪤[R,ⓕ[I]V.T] L2 → L1 ⪤[R,T] L2.
 #R #I #L1 #L2 #V #T #H elim (rex_inv_flat … H) -H //
 qed-.
 
 lemma rex_fwd_dx (R):
       ∀I2,L1,K2,T. L1 ⪤[R,T] K2.ⓘ[I2] →
       ∃∃I1,K1. L1 = K1.ⓘ[I1].
-#R #I2 #L1 #K2 #T * #f elim (pn_split f) * #g #Hg #_ #Hf destruct
+#R #I2 #L1 #K2 #T * #f elim (pr_map_split_tl f) * #g #Hg #_ #Hf destruct
 [ elim (sex_inv_push2 … Hf) | elim (sex_inv_next2 … Hf) ] -Hf #I1 #K1 #_ #_ #H destruct
 /2 width=3 by ex1_2_intro/
 qed-.
 
 (* Basic properties *********************************************************)
 
-lemma rex_atom (R): ∀I. ⋆ ⪤[R,⓪[I]] ⋆.
+lemma rex_atom (R):
+      ∀I. ⋆ ⪤[R,⓪[I]] ⋆.
 #R * /3 width=3 by frees_sort, frees_atom, frees_gref, sex_atom, ex2_intro/
 qed.
 
@@ -273,7 +290,7 @@ lemma rex_sort (R):
       ∀I1,I2,L1,L2,s. L1 ⪤[R,⋆s] L2 → L1.ⓘ[I1] ⪤[R,⋆s] L2.ⓘ[I2].
 #R #I1 #I2 #L1 #L2 #s * #f #Hf #H12
 lapply (frees_inv_sort … Hf) -Hf
-/4 width=3 by frees_sort, sex_push, isid_push, ex2_intro/
+/4 width=3 by frees_sort, sex_push, pr_isi_push, ex2_intro/
 qed.
 
 lemma rex_pair (R):
@@ -297,7 +314,7 @@ lemma rex_gref (R):
       ∀I1,I2,L1,L2,l. L1 ⪤[R,§l] L2 → L1.ⓘ[I1] ⪤[R,§l] L2.ⓘ[I2].
 #R #I1 #I2 #L1 #L2 #l * #f #Hf #H12
 lapply (frees_inv_gref … Hf) -Hf
-/4 width=3 by frees_gref, sex_push, isid_push, ex2_intro/
+/4 width=3 by frees_gref, sex_push, pr_isi_push, ex2_intro/
 qed.
 
 lemma rex_bind_repl_dx (R):