X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Freduction%2Fcpx_lleq.ma;h=7779c7f923331a3be017bb1303c8f41df347c358;hb=a76f56fdad6348b167376093920650379c9936d4;hp=ae6ddac78b7e0bc44e141da5e33210c96ca9f11b;hpb=8a5a354c9ac3ef20ca01dbeb61f6b99902f172a7;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/reduction/cpx_lleq.ma b/matita/matita/contribs/lambdadelta/basic_2/reduction/cpx_lleq.ma
index ae6ddac78..7779c7f92 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/reduction/cpx_lleq.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/reduction/cpx_lleq.ma
@@ -12,9 +12,8 @@
 (*                                                                        *)
 (**************************************************************************)
 
-include "basic_2/relocation/lleq_leq.ma".
-include "basic_2/relocation/lleq_ldrop.ma".
-include "basic_2/reduction/cpx.ma".
+include "basic_2/substitution/lleq_ldrop.ma".
+include "basic_2/reduction/cpx_llpx_sn.ma".
 
 (* CONTEXT-SENSITIVE EXTENDED PARALLEL REDUCTION FOR TERMS ******************)
 
@@ -44,36 +43,13 @@ lemma lleq_cpx_trans: ∀h,g,G,L2,T1,T2. ⦃G, L2⦄ ⊢ T1 ➡[h, g] T2 →
 ]
 qed-.
 
-(* Note: lemma 1000 *)
-lemma lleq_cpx_conf_dx: ∀h,g,G,L2,T1,T2. ⦃G, L2⦄ ⊢ T1 ➡[h, g] T2 →
-                        ∀L1. L1 ⋕[T1, 0] L2 → L1 ⋕[T2, 0] L2.
-#h #g #G #L2 #T1 #T2 #H elim H -G -L2 -T1 -T2
-[ //
-| /3 width=3 by lleq_fwd_length, lleq_sort/
-| #I #G #L2 #K2 #V1 #V2 #W2 #i #HLK2 #_ #HVW2 #IHV12 #L1 #H elim (lleq_inv_lref_ge_dx … H … HLK2) // -H
-  #K1 #HLK1 #HV1
-  lapply (ldrop_fwd_drop2 … HLK1) -HLK1 #HLK1
-  lapply (ldrop_fwd_drop2 … HLK2) -HLK2 #HLK2
-  @(lleq_lift_le … HLK1 HLK2 … HVW2) -HLK1 -HLK2 -HVW2 /2 width=1 by/ (**) (* full auto too slow *)
-| #a #I #G #L2 #V1 #V2 #T1 #T2 #_ #_ #IHV12 #IHT12 #L1 #H elim (lleq_inv_bind_O … H) -H
-  /4 width=5 by lleq_bind_repl_SO, lleq_bind/
-| #I #G #L2 #V1 #V2 #T1 #T2 #_ #_ #IHV12 #IHT12 #L1 #H elim (lleq_inv_flat … H) -H
-  /3 width=1 by lleq_flat/
-| #G #L2 #V #T1 #T2 #T #_ #HT2 #IHT12 #L1 #H elim (lleq_inv_bind_O … H) -H
-  /3 width=10 by lleq_inv_lift_le, ldrop_drop/
-| #G #L2 #V #T1 #T2 #_ #IHT12 #L1 #H elim (lleq_inv_flat … H) -H /2 width=1 by/
-| #G #L2 #V1 #V2 #T #_ #IHV12 #L1 #H elim (lleq_inv_flat … H) -H /2 width=1 by/
-| #a #G #L2 #V1 #V2 #W1 #W2 #T1 #T2 #_ #_ #_ #IHV12 #IHW12 #IHT12 #L1 #H elim (lleq_inv_flat … H) -H
-  #HV1 #H elim (lleq_inv_bind_O … H) -H
-  /4 width=5 by lleq_bind_repl_SO, lleq_flat, lleq_bind/
-| #a #G #L2 #V1 #V2 #V #W1 #W2 #T1 #T2 #_ #HV2 #_ #_ #IHV12 #IHW12 #IHT12 #L1 #H elim (lleq_inv_flat … H) -H
-  #HV1 #H elim (lleq_inv_bind_O … H) -H
-  #HW1 #HT1 @lleq_bind_O /2 width=1 by/ @lleq_flat (**) (* full auto too slow *)
-  [ /3 width=10 by lleq_lift_le, ldrop_drop/
-  | /3 width=3 by lleq_bind_repl_O/
-]
-qed-.
+lemma cpx_lleq_conf: ∀h,g,G,L2,T1,T2. ⦃G, L2⦄ ⊢ T1 ➡[h, g] T2 →
+                     ∀L1. L2 ⋕[T1, 0] L1 → ⦃G, L1⦄ ⊢ T1 ➡[h, g] T2.
+/3 width=3 by lleq_cpx_trans, lleq_sym/ qed-.
+
+lemma cpx_lleq_conf_sn: ∀h,g,G. s_r_confluent1 … (cpx h g G) (lleq 0).
+/3 width=6 by cpx_llpx_sn_conf, lift_mono, ex2_intro/ qed-.
 
-lemma lleq_cpx_conf_sn: ∀h,g,G,L1,T1,T2. ⦃G, L1⦄ ⊢ T1 ➡[h, g] T2 →
-                        ∀L2. L1 ⋕[T1, 0] L2 → L1 ⋕[T2, 0] L2.
-/4 width=6 by lleq_cpx_conf_dx, lleq_sym/ qed-.
+lemma cpx_lleq_conf_dx: ∀h,g,G,L2,T1,T2. ⦃G, L2⦄ ⊢ T1 ➡[h, g] T2 →
+                        ∀L1. L1 ⋕[T1, 0] L2 → L1 ⋕[T2, 0] L2.
+/4 width=6 by cpx_lleq_conf_sn, lleq_sym/ qed-.