lemma fsle_refl: bi_reflexive … fsle.
#L #T
elim (frees_total L T) #f #Hf
-/2 width=8 by sle_refl, ex4_4_intro/
+/2 width=8 by pr_sle_refl, ex4_4_intro/
qed.
lemma fsle_shift: ∀L1,L2. |L1| = |L2| →
elim (lveq_inj_length … H2L) // -H1L #H1 #H2 destruct
lapply (lveq_inv_bind_O … H2L) -H2L #HL
elim (frees_total L2 V) #g1 #Hg1
-elim (sor_isfin_ex g1 (⫰g2)) /3 width=3 by frees_fwd_isfin, isfin_tl/ #g #Hg #_
-lapply (sor_inv_sle_dx … Hg) #H0g
-/4 width=10 by frees_bind, lveq_void_sn, sle_tl, sle_trans, ex4_4_intro/
+elim (pr_sor_isf_bi g1 (⫰g2)) /3 width=3 by frees_fwd_isfin, pr_isf_tl/ #g #Hg #_
+lapply (pr_sor_inv_sle_dx … Hg) #H0g
+/4 width=10 by frees_bind, lveq_void_sn, pr_sle_tl, pr_sle_trans, ex4_4_intro/
qed.
lemma fsle_bind_dx_sn: ∀L1,L2,V1,V2. ❪L1,V1❫ ⊆ ❪L2,V2❫ →
∀p,I,T2. ❪L1,V1❫ ⊆ ❪L2,ⓑ[p,I]V2.T2❫.
#L1 #L2 #V1 #V2 * #n1 #m1 #f1 #g1 #Hf1 #Hg1 #HL12 #Hfg1 #p #I #T2
elim (frees_total (L2.ⓧ) T2) #g2 #Hg2
-elim (sor_isfin_ex g1 (⫰g2)) /3 width=3 by frees_fwd_isfin, isfin_tl/ #g #Hg #_
+elim (pr_sor_isf_bi g1 (⫰g2)) /3 width=3 by frees_fwd_isfin, pr_isf_tl/ #g #Hg #_
@(ex4_4_intro … g Hf1 … HL12) (**) (* full auto too slow *)
-/4 width=5 by frees_bind_void, sor_inv_sle_sn, sor_tls, sle_trans/
+/4 width=5 by frees_bind_void, pr_sor_inv_sle_sn, pr_sor_tls, pr_sle_trans/
qed.
lemma fsle_bind_dx_dx: ∀L1,L2,T1,T2. ❪L1,T1❫ ⊆ ❪L2.ⓧ,T2❫ → |L1| ≤ |L2| →
∀p,I,V2. ❪L1,T1❫ ⊆ ❪L2,ⓑ[p,I]V2.T2❫.
#L1 #L2 #T1 #T2 * #n1 #x1 #f2 #g2 #Hf2 #Hg2 #H #Hfg2 #HL12 #p #I #V2
elim (lveq_inv_void_dx_length … H HL12) -H -HL12 #m1 #HL12 #H1 #H2 destruct
-<tls_xn in Hfg2; #Hfg2
+<pr_tls_swap in Hfg2; #Hfg2
elim (frees_total L2 V2) #g1 #Hg1
-elim (sor_isfin_ex g1 (⫰g2)) /3 width=3 by frees_fwd_isfin, isfin_tl/ #g #Hg #_
+elim (pr_sor_isf_bi g1 (⫰g2)) /3 width=3 by frees_fwd_isfin, pr_isf_tl/ #g #Hg #_
@(ex4_4_intro … g Hf2 … HL12) (**) (* full auto too slow *)
-/4 width=5 by frees_bind_void, sor_inv_sle_dx, sor_tls, sle_trans/
+/4 width=5 by frees_bind_void, pr_sor_inv_sle_dx, pr_sor_tls, pr_sle_trans/
qed.
lemma fsle_flat_dx_sn: ∀L1,L2,V1,V2. ❪L1,V1❫ ⊆ ❪L2,V2❫ →
∀I,T2. ❪L1,V1❫ ⊆ ❪L2,ⓕ[I]V2.T2❫.
#L1 #L2 #V1 #V2 * #n1 #m1 #f1 #g1 #Hf1 #Hg1 #HL12 #Hfg1 #I #T2
elim (frees_total L2 T2) #g2 #Hg2
-elim (sor_isfin_ex g1 g2) /2 width=3 by frees_fwd_isfin/ #g #Hg #_
+elim (pr_sor_isf_bi g1 g2) /2 width=3 by frees_fwd_isfin/ #g #Hg #_
@(ex4_4_intro … g Hf1 … HL12) (**) (* full auto too slow *)
-/4 width=5 by frees_flat, sor_inv_sle_sn, sor_tls, sle_trans/
+/4 width=5 by frees_flat, pr_sor_inv_sle_sn, pr_sor_tls, pr_sle_trans/
qed.
lemma fsle_flat_dx_dx: ∀L1,L2,T1,T2. ❪L1,T1❫ ⊆ ❪L2,T2❫ →
∀I,V2. ❪L1,T1❫ ⊆ ❪L2,ⓕ[I]V2.T2❫.
#L1 #L2 #T1 #T2 * #n1 #m1 #f2 #g2 #Hf2 #Hg2 #HL12 #Hfg2 #I #V2
elim (frees_total L2 V2) #g1 #Hg1
-elim (sor_isfin_ex g1 g2) /2 width=3 by frees_fwd_isfin/ #g #Hg #_
+elim (pr_sor_isf_bi g1 g2) /2 width=3 by frees_fwd_isfin/ #g #Hg #_
@(ex4_4_intro … g Hf2 … HL12) (**) (* full auto too slow *)
-/4 width=5 by frees_flat, sor_inv_sle_dx, sor_tls, sle_trans/
+/4 width=5 by frees_flat, pr_sor_inv_sle_dx, pr_sor_tls, pr_sle_trans/
qed.
(* Advanced forward lemmas ***************************************************)
elim (lveq_inv_pair_pair … HL12) -HL12 #HL12 #H1 #H2 destruct
elim (frees_total (L1.ⓧ) T1) #g1 #Hg1
lapply (lsubr_lsubf … Hg1 … Hf1) -Hf1 /2 width=1 by lsubr_unit/ #Hfg1
-/5 width=10 by lsubf_fwd_sle, lveq_bind, sle_trans, ex4_4_intro/ (**) (* full auto too slow *)
+/5 width=10 by lsubf_fwd_sle, lveq_bind, pr_sle_trans, ex4_4_intro/ (**) (* full auto too slow *)
qed-.