(**************************************************************************)
include "ground_2/relocation/rtmap_sle.ma".
+include "ground_2/relocation/rtmap_sdj.ma".
include "basic_2/notation/relations/relationstar_5.ma".
include "basic_2/syntax/lenv.ma".
relation3 lenv bind bind → relation3 lenv bind bind →
relation3 lenv bind bind → relation3 lenv bind bind →
relation3 rtmap lenv bind ≝
- λR1,R2,RN1,RP1,RN2,RP2,f,L0,T0.
- ∀T1. R1 L0 T0 T1 → ∀T2. R2 L0 T0 T2 →
+ λR1,R2,RN1,RP1,RN2,RP2,f,L0,I0.
+ ∀I1. R1 L0 I0 I1 → ∀I2. R2 L0 I0 I2 →
∀L1. L0 ⪤*[RN1, RP1, f] L1 → ∀L2. L0 ⪤*[RN2, RP2, f] L2 →
- ∃∃T. R2 L1 T1 T & R1 L2 T2 T.
+ ∃∃I. R2 L1 I1 I & R1 L2 I2 I.
-definition lexs_transitive: relation5 (relation3 lenv bind bind)
- (relation3 lenv bind bind) … ≝
- λR1,R2,R3,RN,RP.
- ∀f,L1,T1,T. R1 L1 T1 T → ∀L2. L1 ⪤*[RN, RP, f] L2 →
- ∀T2. R2 L2 T T2 → R3 L1 T1 T2.
+definition lexs_transitive: relation3 lenv bind bind → relation3 lenv bind bind →
+ relation3 lenv bind bind →
+ relation3 lenv bind bind → relation3 lenv bind bind →
+ relation3 rtmap lenv bind ≝
+ λR1,R2,R3,RN,RP,f,L1,I1.
+ ∀I. R1 L1 I1 I → ∀L2. L1 ⪤*[RN, RP, f] L2 →
+ ∀I2. R2 L2 I I2 → R3 L1 I1 I2.
(* Basic inversion lemmas ***************************************************)
#RN #RP #L1 #L2 @eq_repl_sym /2 width=3 by lexs_eq_repl_back/ (**) (* full auto fails *)
qed-.
-(* Basic_2A1: uses: lpx_sn_refl *)
-lemma lexs_refl: ∀RN,RP.
- (∀L. reflexive … (RN L)) →
- (∀L. reflexive … (RP L)) →
+lemma lexs_refl: ∀RN,RP. c_reflexive … RN → c_reflexive … RP →
∀f.reflexive … (lexs RN RP f).
#RN #RP #HRN #HRP #f #L generalize in match f; -f elim L -L //
#L #I #IH #f elim (pn_split f) *
L1.ⓘ{J1} ⪤*[RN, RP, f] L2.ⓘ{J2}.
/3 width=3 by lexs_inv_tl, lexs_fwd_bind/ qed-.
-lemma lexs_co: ∀RN1,RP1,RN2,RP2.
- (∀L1,I1,I2. RN1 L1 I1 I2 → RN2 L1 I1 I2) →
- (∀L1,I1,I2. RP1 L1 I1 I2 → RP2 L1 I1 I2) →
+lemma lexs_co: ∀RN1,RP1,RN2,RP2. RN1 ⊆ RN2 → RP1 ⊆ RP2 →
∀f,L1,L2. L1 ⪤*[RN1, RP1, f] L2 → L1 ⪤*[RN2, RP2, f] L2.
#RN1 #RP1 #RN2 #RP2 #HRN #HRP #f #L1 #L2 #H elim H -f -L1 -L2
/3 width=1 by lexs_atom, lexs_next, lexs_push/
qed-.
-lemma lexs_co_isid: ∀RN1,RP1,RN2,RP2.
- (∀L1,I1,I2. RP1 L1 I1 I2 → RP2 L1 I1 I2) →
+lemma lexs_co_isid: ∀RN1,RP1,RN2,RP2. RP1 ⊆ RP2 →
∀f,L1,L2. L1 ⪤*[RN1, RP1, f] L2 → 𝐈⦃f⦄ →
L1 ⪤*[RN2, RP2, f] L2.
#RN1 #RP1 #RN2 #RP2 #HR #f #L1 #L2 #H elim H -f -L1 -L2 //
]
qed-.
-lemma sle_lexs_trans: ∀RN,RP. (∀L,I1,I2. RN L I1 I2 → RP L I1 I2) →
+lemma lexs_sdj: ∀RN,RP. RP ⊆ RN →
+ ∀f1,L1,L2. L1 ⪤*[RN, RP, f1] L2 →
+ ∀f2. f1 ∥ f2 → L1 ⪤*[RP, RN, f2] L2.
+#RN #RP #HR #f1 #L1 #L2 #H elim H -f1 -L1 -L2 //
+#f1 #I1 #I2 #L1 #L2 #_ #HI12 #IH #f2 #H12
+[ elim (sdj_inv_nx … H12) -H12 [2,3: // ]
+ #g2 #H #H2 destruct /3 width=1 by lexs_push/
+| elim (sdj_inv_px … H12) -H12 [2,4: // ] *
+ #g2 #H #H2 destruct /3 width=1 by lexs_next, lexs_push/
+]
+qed-.
+
+lemma sle_lexs_trans: ∀RN,RP. RN ⊆ RP →
∀f2,L1,L2. L1 ⪤*[RN, RP, f2] L2 →
∀f1. f1 ⊆ f2 → L1 ⪤*[RN, RP, f1] L2.
#RN #RP #HR #f2 #L1 #L2 #H elim H -f2 -L1 -L2 //
]
qed-.
-lemma sle_lexs_conf: ∀RN,RP. (∀L,I1,I2. RP L I1 I2 → RN L I1 I2) →
+lemma sle_lexs_conf: ∀RN,RP. RP ⊆ RN →
∀f1,L1,L2. L1 ⪤*[RN, RP, f1] L2 →
∀f2. f1 ⊆ f2 → L1 ⪤*[RN, RP, f2] L2.
#RN #RP #HR #f1 #L1 #L2 #H elim H -f1 -L1 -L2 //
]
qed-.
-lemma lexs_sle_split: ∀R1,R2,RP. (∀L. reflexive … (R1 L)) → (∀L. reflexive … (R2 L)) →
+lemma lexs_sle_split: ∀R1,R2,RP. c_reflexive … R1 → c_reflexive … R2 →
∀f,L1,L2. L1 ⪤*[R1, RP, f] L2 → ∀g. f ⊆ g →
∃∃L. L1 ⪤*[R1, RP, g] L & L ⪤*[R2, cfull, f] L2.
#R1 #R2 #RP #HR1 #HR2 #f #L1 #L2 #H elim H -f -L1 -L2
]
qed-.
+lemma lexs_sdj_split: ∀R1,R2,RP. c_reflexive … R1 → c_reflexive … R2 →
+ ∀f,L1,L2. L1 ⪤*[R1, RP, f] L2 → ∀g. f ∥ g →
+ ∃∃L. L1 ⪤*[RP, R1, g] L & L ⪤*[R2, cfull, f] L2.
+#R1 #R2 #RP #HR1 #HR2 #f #L1 #L2 #H elim H -f -L1 -L2
+[ /2 width=3 by lexs_atom, ex2_intro/ ]
+#f #I1 #I2 #L1 #L2 #_ #HI12 #IH #y #H
+[ elim (sdj_inv_nx … H ??) -H [ |*: // ] #g #Hfg #H destruct
+ elim (IH … Hfg) -IH -Hfg /3 width=5 by lexs_next, lexs_push, ex2_intro/
+| elim (sdj_inv_px … H ??) -H [1,3: * |*: // ] #g #Hfg #H destruct
+ elim (IH … Hfg) -IH -Hfg /3 width=5 by lexs_next, lexs_push, ex2_intro/
+]
+qed-.
+
lemma lexs_dec: ∀RN,RP.
(∀L,I1,I2. Decidable (RN L I1 I2)) →
(∀L,I1,I2. Decidable (RP L I1 I2)) →