(**************************************************************************)
include "basic_2/reducibility/cnf.ma".
+include "basic_2/computation/tprs.ma".
(* CONTEXT-SENSITIVE PARALLEL COMPUTATION ON TERMS **************************)
/2 width=3/ qed.
(* Note: it does not hold replacing |L1| with |L2| *)
-lemma cprs_lsubs_conf: ∀L1,T1,T2. L1 ⊢ T1 ➡* T2 →
- ∀L2. L1 ≼ [0, |L1|] L2 → L2 ⊢ T1 ➡* T2.
+lemma cprs_lsubs_trans: ∀L1,T1,T2. L1 ⊢ T1 ➡* T2 →
+ ∀L2. L2 ≼ [0, |L1|] L1 → L2 ⊢ T1 ➡* T2.
/3 width=3/
qed.
@(cprs_strap1 … IHT2) -IHT2 /2 width=1/
qed.
+(* Basic_1: was: pr3_pr1 *)
+lemma tprs_cprs: ∀T1,T2. T1 ➡* T2 → ∀L. L ⊢ T1 ➡* T2.
+#T1 #T2 #H @(tprs_ind … H) -T2 /2 width=1/ /3 width=3/
+qed.
+
(* Basic inversion lemmas ***************************************************)
(* Basic_1: was: pr3_gen_sort *)
qed-.
(* Basic_1: was: pr3_gen_cast *)
-lemma cprs_inv_cast1: â\88\80L,W1,T1,U2. L â\8a¢ â\93£W1.T1 ➡* U2 → L ⊢ T1 ➡* U2 ∨
- â\88\83â\88\83W2,T2. L â\8a¢ W1 â\9e¡* W2 & L â\8a¢ T1 â\9e¡* T2 & U2 = â\93£W2.T2.
+lemma cprs_inv_cast1: â\88\80L,W1,T1,U2. L â\8a¢ â\93\9dW1.T1 ➡* U2 → L ⊢ T1 ➡* U2 ∨
+ â\88\83â\88\83W2,T2. L â\8a¢ W1 â\9e¡* W2 & L â\8a¢ T1 â\9e¡* T2 & U2 = â\93\9dW2.T2.
#L #W1 #T1 #U2 #H @(cprs_ind … H) -U2 /3 width=5/
#U2 #U #_ #HU2 * /3 width=3/ *
#W #T #HW1 #HT1 #H destruct
qed-.
(* Basic_1: was: nf2_pr3_unfold *)
-lemma cprs_inv_cnf1: ∀L,T,U. L ⊢ T ➡* U → L ⊢ 𝐍[T] → T = U.
+lemma cprs_inv_cnf1: ∀L,T,U. L ⊢ T ➡* U → L ⊢ 𝐍⦃T⦄ → T = U.
#L #T #U #H @(cprs_ind_dx … H) -T //
#T0 #T #H1T0 #_ #IHT #H2T0
lapply (H2T0 … H1T0) -H1T0 #H destruct /2 width=1/
qed-.
+lemma tprs_inv_cnf1: ∀T,U. T ➡* U → ⋆ ⊢ 𝐍⦃T⦄ → T = U.
+/3 width=3 by tprs_cprs, cprs_inv_cnf1/ qed-.
+
(* Basic_1: removed theorems 10:
clear_pr3_trans pr3_cflat pr3_gen_bind
pr3_head_1 pr3_head_2 pr3_head_21 pr3_head_12