X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fdynamic%2Fcnv_cpms_conf.ma;h=a818e63479b36946d67322a37bb90195fb760aaa;hb=3c7b4071a9ac096b02334c1d47468776b948e2de;hp=ee7c6101b33f82034d611d8a3baa918f7572c0ca;hpb=d71e53021b0c17e1a00c2d623e7139c6d18069d5;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/dynamic/cnv_cpms_conf.ma b/matita/matita/contribs/lambdadelta/basic_2/dynamic/cnv_cpms_conf.ma
index ee7c6101b..a818e6347 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/dynamic/cnv_cpms_conf.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/dynamic/cnv_cpms_conf.ma
@@ -12,32 +12,158 @@
 (*                                                                        *)
 (**************************************************************************)
 
-include "basic_2/dynamic/cnv_cpm_trans.ma".
 include "basic_2/dynamic/cnv_cpm_conf.ma".
+include "basic_2/dynamic/cnv_cpms_teqx_conf.ma".
 
 (* CONTEXT-SENSITIVE NATIVE VALIDITY FOR TERMS ******************************)
 
-(* Far confluence propery with t-bound rt-computation for terms *************)
-
-fact cnv_cpsms_conf_lpr_aux (a) (h) (o):
-                            ∀G0,L0,T0.
-                            (∀G1,L1,T1. ⦃G0, L0, T0⦄ >[h, o] ⦃G1, L1, T1⦄ → IH_cnv_cpm_trans_lpr a h G1 L1 T1) →
-                            (∀G1,L1,T1. ⦃G0, L0, T0⦄ >[h, o] ⦃G1, L1, T1⦄ → IH_cnv_cpms_conf_lpr a h G1 L1 T1) →
-                            ∀G1,L1,T1. G0 = G1 → L0 = L1 → T0 = T1 → IH_cnv_cpsms_conf_lpr a h o G1 L1 T1.
-#a #h #o #G #L #T #IH2 #IH1 #G0 #L0 #T0 #HG #HL #HT #HT0
-#n1 #T1 * #m11 #m12 #X1 #HnX01 #HX01 #HXT1 #H1
-#n2 #T2 * #m21 #m22 #X2 #HnX02 #HX02 #HXT2 #H2
-#L1 #HL01 #L2 #HL02 destruct
+(* Sub confluence propery with t-bound rt-computation for terms *************)
+
+fact cnv_cpms_conf_lpr_teqx_teqx_aux (h) (a) (G0) (L0) (T0):
+     (∀G,L,T. ❪G0,L0,T0❫ > ❪G,L,T❫ → IH_cnv_cpm_trans_lpr h a G L T) →
+     (∀G,L,T. ❪G0,L0,T0❫ > ❪G,L,T❫ → IH_cnv_cpms_conf_lpr h a G L T) →
+     ❪G0,L0❫ ⊢ T0 ![h,a] →
+     ∀n1,T1. ❪G0,L0❫ ⊢ T0 ➡*[h,n1] T1 → T0 ≛ T1 →
+     ∀n2,T2. ❪G0,L0❫ ⊢ T0 ➡*[h,n2] T2 → T0 ≛ T2 →
+     ∀L1. ❪G0,L0❫ ⊢ ➡[h,0] L1 → ∀L2. ❪G0,L0❫ ⊢ ➡[h,0] L2 →
+     ∃∃T. ❪G0,L1❫ ⊢ T1 ➡*[h,n2-n1] T & ❪G0,L2❫ ⊢ T2 ➡*[h,n1-n2] T.
+#h #a #G #L0 #T0 #IH2 #IH1 #HT0
+#n1 #T1 #H1T01 #H2T01 #n2 #T2 #H1T02 #H2T02
+#L1 #HL01 #L2 #HL02
+elim (cnv_cpms_teqx_conf_lpr_aux … IH2 IH1 … H1T01 … H1T02 … HL01 … HL02) -IH2 -IH1 -H1T01 -H1T02 -HL01 -HL02
+/2 width=3 by ex2_intro/
+qed-.
+
+fact cnv_cpms_conf_lpr_refl_tneqx_sub (h) (a) (G0) (L0) (T0) (m21) (m22):
+     (∀G,L,T. ❪G0,L0,T0❫ > ❪G,L,T❫ → IH_cnv_cpm_trans_lpr h a G L T) →
+     (∀G,L,T. ❪G0,L0,T0❫ > ❪G,L,T❫ → IH_cnv_cpms_conf_lpr h a G L T) →
+     ❪G0,L0❫ ⊢ T0 ![h,a] →
+     ∀X2. ❪G0,L0❫ ⊢ T0 ➡[h,m21] X2 → (T0 ≛ X2 → ⊥) → ∀T2. ❪G0,L0❫ ⊢ X2 ➡*[h,m22] T2 →
+     ∀L1. ❪G0,L0❫ ⊢ ➡[h,0] L1 → ∀L2. ❪G0,L0❫ ⊢ ➡[h,0] L2 →
+     ∃∃T. ❪G0,L1❫ ⊢ T0 ➡*[h,m21+m22] T& ❪G0,L2❫ ⊢ T2 ➡*[h,0] T.
+#h #a #G0 #L0 #T0 #m21 #m22 #IH2 #IH1 #H0
+#X2 #HX02 #HnX02 #T2 #HXT2
+#L1 #HL01 #L2 #HL02
+lapply (cnv_cpm_trans_lpr_aux … IH1 IH2 … HX02 … L0 ?) // #HX2
+elim (cnv_cpm_conf_lpr_aux … IH2 IH1 … HX02 … 0 T0 … L0 … HL01) //
+<minus_n_O <minus_O_n #Y1 #HXY1 #HTY1
+elim (cnv_cpms_strip_lpr_sub … IH1 … HXT2 0 X2 … HL02 L0) [|*: /4 width=3 by fpb_fpbg, cpm_fpb/ ]
+<minus_n_O <minus_O_n #Y2 #HTY2 #HXY2 -HXT2
+elim (IH1 … HXY1 … HXY2 … HL01 … HL02) [|*: /4 width=3 by fpb_fpbg, cpm_fpb/ ]
+-a -L0 -X2 <minus_n_O <minus_O_n #Y #HY1 #HY2
+lapply (cpms_trans … HTY1 … HY1) -Y1 #HT0Y
+lapply (cpms_trans … HTY2 … HY2) -Y2 #HT2Y
+/2 width=3 by ex2_intro/
+qed-.
+
+fact cnv_cpms_conf_lpr_step_tneqx_sub (h) (a) (G0) (L0) (T0) (m11) (m12) (m21) (m22):
+     (∀G,L,T. ❪G0,L0,T0❫ > ❪G,L,T❫ → IH_cnv_cpm_trans_lpr h a G L T) →
+     (∀G,L,T. ❪G0,L0,T0❫ > ❪G,L,T❫ → IH_cnv_cpms_conf_lpr h a G L T) →
+     ❪G0,L0❫ ⊢ T0 ![h,a] →
+     ∀X1. ❪G0,L0❫ ⊢ T0 ➡[h,m11] X1 → T0 ≛ X1 → ∀T1. ❪G0,L0❫ ⊢ X1 ➡*[h,m12] T1 → X1 ≛ T1 →
+     ∀X2. ❪G0,L0❫ ⊢ T0 ➡[h,m21] X2 → (T0 ≛ X2 → ⊥) → ∀T2. ❪G0,L0❫ ⊢ X2 ➡*[h,m22] T2 →
+     ∀L1. ❪G0,L0❫ ⊢ ➡[h,0] L1 → ∀L2. ❪G0,L0❫ ⊢ ➡[h,0] L2 →
+     ((∀G,L,T. ❪G0,L0,X1❫ > ❪G,L,T❫ → IH_cnv_cpm_trans_lpr h a G L T) →
+       (∀G,L,T. ❪G0,L0,X1❫ > ❪G,L,T❫ → IH_cnv_cpms_conf_lpr h a G L T) →
+       ∀m21,m22.
+       ∀X2. ❪G0,L0❫ ⊢ X1 ➡[h,m21] X2 → (X1 ≛ X2 → ⊥) →
+       ∀T2. ❪G0,L0❫ ⊢ X2 ➡*[h,m22] T2 →
+       ∀L1. ❪G0,L0❫ ⊢ ➡[h,0] L1 → ∀L2. ❪G0,L0❫ ⊢ ➡[h,0] L2 →
+       ∃∃T. ❪G0,L1❫ ⊢ T1 ➡*[h,m21+m22-m12] T & ❪G0,L2❫ ⊢ T2 ➡*[h,m12-(m21+m22)]T
+     ) →
+     ∃∃T. ❪G0,L1❫ ⊢ T1 ➡*[h,m21+m22-(m11+m12)] T & ❪G0,L2❫ ⊢ T2 ➡*[h,m11+m12-(m21+m22)] T.
+#h #a #G0 #L0 #T0 #m11 #m12 #m21 #m22 #IH2 #IH1 #HT0
+#X1 #H1X01 #H2X01 #T1 #H1XT1 #H2XT1 #X2 #H1X02 #H2X02 #T2 #HXT2
+#L1 #HL01 #L2 #HL02 #IH
+lapply (cnv_cpm_trans_lpr_aux … IH1 IH2 … H1X01 … L0 ?) // #HX1
+lapply (cnv_cpm_trans_lpr_aux … IH1 IH2 … H1X02 … L0 ?) // #HX2
+elim (cnv_cpm_conf_lpr_aux … IH2 IH1 … H1X01 … H1X02 … L0 … L0) // #Z0 #HXZ10 #HXZ20
+cut (❪G0, L0, T0❫ > ❪G0, L0, X2❫) [ /4 width=5 by cpms_fwd_fpbs, cpm_fpb, ex2_3_intro/ ] #H1fpbg (**) (* cut *)
+lapply (fpbg_fpbs_trans ? G0 ? L0 ? Z0 ? … H1fpbg) [ /2 width=3 by cpms_fwd_fpbs/ ] #H2fpbg
+lapply (cnv_cpms_trans_lpr_sub … IH2 … HXZ20 … L0 ?) // #HZ0
+elim (IH1 … HXT2 … HXZ20 … L2 … L0) [|*: /4 width=2 by fpb_fpbg, cpm_fpb/ ] -HXT2 -HXZ20 #Z2 #HTZ2 #HZ02
+elim (teqx_dec X1 Z0) #H2XZ
+[ -IH
+  elim (cnv_cpms_conf_lpr_teqx_teqx_aux … HX1 … H1XT1 H2XT1 … HXZ10 H2XZ … L1 … L0) [2,3: // |4,5: /4 width=5 by cpm_fpbq, fpbq_fpbg_trans/ ]
+| -H1XT1 -H2XT1
+  elim (cpms_tneqx_fwd_step_sn_aux … HXZ10 HX1 H2XZ) [|*: /4 width=5 by cpm_fpbq, fpbq_fpbg_trans/ ]
+  -HXZ10 -H2XZ #n1 #n2 #X0 #H1X10 #H2X10 #HXZ0 #Hn
+  elim (IH … H1X10 H2X10 … HXZ0 … L1 … L0) [2,3: // |4,5: /4 width=5 by cpm_fpbq, fpbq_fpbg_trans/ ]
+  >Hn -n1 -n2 -X0 -IH
+]
+#Z1 #HTZ1 #HZ01
+elim (IH1 … HZ01 … HZ02  L1 … L2) // -L0 -T0 -X1 -X2 -Z0 #Z #HZ01 #HZ02
+lapply (cpms_trans … HTZ1 … HZ01) -Z1 <arith_l4 #HT1Z
+lapply (cpms_trans … HTZ2 … HZ02) -Z2 <arith_l4 #HT2Z
+/2 width=3 by ex2_intro/
+qed-.
+
+fact cnv_cpms_conf_lpr_teqx_tneqx_aux (h) (a) (G0) (L0) (T0) (n1) (m21) (m22):
+     (∀G,L,T. ❪G0,L0,T0❫ > ❪G,L,T❫ → IH_cnv_cpm_trans_lpr h a G L T) →
+     (∀G,L,T. ❪G0,L0,T0❫ > ❪G,L,T❫ → IH_cnv_cpms_conf_lpr h a G L T) →
+     ❪G0,L0❫ ⊢ T0 ![h,a] →
+     ∀T1. ❪G0,L0❫ ⊢ T0 ➡*[h,n1] T1 → T0 ≛ T1 →
+     ∀X2. ❪G0,L0❫ ⊢ T0 ➡[h,m21] X2 → (T0 ≛ X2 → ⊥) → ∀T2. ❪G0,L0❫ ⊢ X2 ➡*[h,m22] T2 →
+     ∀L1. ❪G0,L0❫ ⊢ ➡[h,0] L1 → ∀L2. ❪G0,L0❫ ⊢ ➡[h,0] L2 →
+     ∃∃T. ❪G0,L1❫ ⊢ T1 ➡*[h,m21+m22-n1] T & ❪G0,L2❫ ⊢ T2 ➡*[h,n1-(m21+m22)] T.
+#h #a #G0 #L0 #T0 #n1 #m21 #m22 #IH2 #IH1 #HT0
+#T1 #H1T01 #H2T01
+generalize in match m22; generalize in match m21; -m21 -m22
+generalize in match IH1; generalize in match IH2;
+@(cpms_teqx_ind_sn … H1T01 HT0 H2T01 IH1 IH2) -n1 -T0
+[ #HT1 #IH2 #IH1 #m21 #m22
+  #X2 #HX02 #HnX02 #T2 #HXT2 #L1 #HL01 #L2 #HL02
+  <minus_O_n <minus_n_O
+  @(cnv_cpms_conf_lpr_refl_tneqx_sub … IH2 IH1) -IH2 -IH1 /2 width=4 by/
+| #m11 #m12 #T0 #X1 #H1X01 #HT0 #H2X01 #H1XT1 #_ #H2XT1 #IH #IH2 #IH1 #m21 #m22
+  #X2 #HX02 #HnX02 #T2 #HXT2 #L1 #HL01 #L2 #HL02
+  @(cnv_cpms_conf_lpr_step_tneqx_sub … IH2 IH1 … IH) -IH2 -IH1 -IH /2 width=4 by/
+]
+qed-.
+
+fact cnv_cpms_conf_lpr_tneqx_tneqx_aux (h) (a) (G0) (L0) (T0) (m11) (m12) (m21) (m22):
+     (∀G,L,T. ❪G0,L0,T0❫ > ❪G,L,T❫ → IH_cnv_cpm_trans_lpr h a G L T) →
+     (∀G,L,T. ❪G0,L0,T0❫ > ❪G,L,T❫ → IH_cnv_cpms_conf_lpr h a G L T) →
+     ❪G0,L0❫ ⊢ T0 ![h,a] →
+     ∀X1. ❪G0,L0❫ ⊢ T0 ➡[h,m11] X1 → (T0 ≛ X1 → ⊥) → ∀T1. ❪G0,L0❫ ⊢ X1 ➡*[h,m12] T1 →
+     ∀X2. ❪G0,L0❫ ⊢ T0 ➡[h,m21] X2 → (T0 ≛ X2 → ⊥) → ∀T2. ❪G0,L0❫ ⊢ X2 ➡*[h,m22] T2 →
+     ∀L1. ❪G0,L0❫ ⊢ ➡[h,0] L1 → ∀L2. ❪G0,L0❫ ⊢ ➡[h,0] L2 →
+     ∃∃T. ❪G0,L1❫ ⊢ T1 ➡*[h,m21+m22-(m11+m12)] T & ❪G0,L2❫ ⊢ T2 ➡*[h,m11+m12-(m21+m22)] T.
+#h #a #G0 #L0 #T0 #m11 #m12 #m21 #m22 #IH2 #IH1 #H0
+#X1 #HX01 #HnX01 #T1 #HXT1 #X2 #HX02 #HnX02 #T2 #HXT2
+#L1 #HL01 #L2 #HL02
 lapply (cnv_cpm_trans_lpr_aux … IH1 IH2 … HX01 … L0 ?) // #HX1
 lapply (cnv_cpm_trans_lpr_aux … IH1 IH2 … HX02 … L0 ?) // #HX2
 elim (cnv_cpm_conf_lpr_aux … IH2 IH1 … HX01 … HX02 … L0 … L0) // #Z0 #HXZ10 #HXZ20
-cut (⦃G0,L0,T0⦄ >[h,o] ⦃G0,L0,X1⦄) [ /4 width=5 by cpms_fwd_fpbs, cpm_fpb, ex2_3_intro/ ] #H1fpbg (**) (* cut *)
-lapply (fpbg_fpbs_trans ??? G0 ? L0 ? Z0 ? … H1fpbg) [ /2 width=2 by cpms_fwd_fpbs/ ] #H2fpbg
-lapply (cnv_cpms_trans_lpr_far … IH2 … HXZ10 … L0 ?) // #HZ0
+cut (❪G0, L0, T0❫ > ❪G0, L0, X1❫) [ /4 width=5 by cpms_fwd_fpbs, cpm_fpb, ex2_3_intro/ ] #H1fpbg (**) (* cut *)
+lapply (fpbg_fpbs_trans ? G0 ? L0 ? Z0 ? … H1fpbg) [ /2 width=3 by cpms_fwd_fpbs/ ] #H2fpbg
+lapply (cnv_cpms_trans_lpr_sub … IH2 … HXZ10 … L0 ?) // #HZ0
 elim (IH1 … HXT1 … HXZ10 … L1 … L0) [|*: /4 width=2 by fpb_fpbg, cpm_fpb/ ] -HXT1 -HXZ10 #Z1 #HTZ1 #HZ01
-elim (IH1 … HXT2 … HXZ20 … L2 … L0) [|*: /4 width=2 by fpb_fpbg, cpm_fpb/ ] -HXT2 -HXZ20 #Z2 #HTZ2 #HZ02
+elim (IH1 … HXT2 … HXZ20 … L2 … L0) [|*: /4 width=3 by fpb_fpbg, cpm_fpb/ ] -HXT2 -HXZ20 #Z2 #HTZ2 #HZ02
 elim (IH1 … HZ01 … HZ02  L1 … L2) // -L0 -T0 -X1 -X2 -Z0 #Z #HZ01 #HZ02
 lapply (cpms_trans … HTZ1 … HZ01) -Z1 <arith_l4 #HT1Z
 lapply (cpms_trans … HTZ2 … HZ02) -Z2 <arith_l4 #HT2Z
 /2 width=3 by ex2_intro/
 qed-.
+
+fact cnv_cpms_conf_lpr_aux (h) (a) (G0) (L0) (T0):
+     (∀G,L,T. ❪G0,L0,T0❫ > ❪G,L,T❫ → IH_cnv_cpm_trans_lpr h a G L T) →
+     (∀G,L,T. ❪G0,L0,T0❫ > ❪G,L,T❫ → IH_cnv_cpms_conf_lpr h a G L T) →
+     ∀G,L,T. G0 = G → L0 = L → T0 = T → IH_cnv_cpms_conf_lpr h a G L T.
+#h #a #G #L #T #IH2 #IH1 #G0 #L0 #T0 #HG #HL #HT
+#HT0 #n1 #T1 #HT01 #n2 #T2 #HT02 #L1 #HL01 #L2 #HL02 destruct
+elim (teqx_dec T0 T1) #H2T01
+elim (teqx_dec T0 T2) #H2T02
+[ @(cnv_cpms_conf_lpr_teqx_teqx_aux … IH2 IH1) -IH2 -IH1 /2 width=1 by/
+| elim (cpms_tneqx_fwd_step_sn_aux … HT02 HT0 H2T02 IH1 IH2) -HT02 -H2T02
+  #m21 #m22 #X2 #HX02 #HnX02 #HXT2 #H2 destruct
+  @(cnv_cpms_conf_lpr_teqx_tneqx_aux … IH2 IH1) -IH2 -IH1 /2 width=4 by/
+| elim (cpms_tneqx_fwd_step_sn_aux … HT01 HT0 H2T01 IH1 IH2) -HT01 -H2T01
+  #m11 #m12 #X1 #HX01 #HnX01 #HXT1 #H1 destruct
+  @ex2_commute @(cnv_cpms_conf_lpr_teqx_tneqx_aux … IH2 IH1) -IH2 -IH1 /2 width=4 by/
+| elim (cpms_tneqx_fwd_step_sn_aux … HT01 HT0 H2T01 IH1 IH2) -HT01 -H2T01
+  elim (cpms_tneqx_fwd_step_sn_aux … HT02 HT0 H2T02 IH1 IH2) -HT02 -H2T02
+  #m21 #m22 #X2 #HX02 #HnX02 #HXT2 #H2 #m11 #m12 #X1 #HX01 #HnX01 #HXT1 #H1 destruct
+  @(cnv_cpms_conf_lpr_tneqx_tneqx_aux … IH2 IH1) -IH2 -IH1 /2 width=4 by/
+]
+qed-.