(* *)
(**************************************************************************)
+include "basic_2/notation/relations/normal_2.ma".
include "basic_2/reduction/cpr.ma".
(* CONTEXT-SENSITIVE NORMAL TERMS *******************************************)
lapply (H U ?) -H /2 width=3/ #H destruct
elim (lift_inv_pair_xy_y … HTU)
| #HT
- elim (cpss_delift (⋆) V T (⋆. ⓓV) 0 ?) // #T2 #T1 #HT2 #HT12
+ elim (cpr_delift (⋆) V T (⋆. ⓓV) 0) // #T2 #T1 #HT2 #HT12
lapply (H (+ⓓV.T2) ?) -H /4 width=1/ -HT2 #H destruct /3 width=2/
]
qed-.
| generalize in match HVT1; -HVT1 elim T1 -T1 * // #a * #W1 #U1 #_ #_ #H
[ elim (lift_total V1 0 1) #V2 #HV12
lapply (H (ⓓ{a}W1.ⓐV2.U1) ?) -H /3 width=3/ -HV12 #H destruct
- | lapply (H (ⓓ{a}V1.U1) ?) -H /3 width=1/ #H destruct
+ | lapply (H (ⓓ{a}ⓝW1.V1.U1) ?) -H /3 width=1/ #H destruct
]
qed-.
qed.
(* Basic_1: was: nf2_abst *)
-lemma cnr_abst: ∀a,I,L,V,W,T. L ⊢ 𝐍⦃W⦄ → L. ⓑ{I} V ⊢ 𝐍⦃T⦄ → L ⊢ 𝐍⦃ⓛ{a}W.T⦄.
-#a #I #L #V #W #T #HW #HT #X #H
-elim (cpr_fwd_abst1 … H I V) -H #W0 #T0 #HW0 #HT0 #H destruct
+lemma cnr_abst: ∀a,L,W,T. L ⊢ 𝐍⦃W⦄ → L.ⓛW ⊢ 𝐍⦃T⦄ → L ⊢ 𝐍⦃ⓛ{a}W.T⦄.
+#a #L #W #T #HW #HT #X #H
+elim (cpr_inv_abst1 … H) -H #W0 #T0 #HW0 #HT0 #H destruct
>(HW … HW0) -W0 >(HT … HT0) -T0 //
qed.
(* Basic_1: was only: nf2_appl_lref *)
lemma cnr_appl_simple: ∀L,V,T. L ⊢ 𝐍⦃V⦄ → L ⊢ 𝐍⦃T⦄ → 𝐒⦃T⦄ → L ⊢ 𝐍⦃ⓐV.T⦄.
#L #V #T #HV #HT #HS #X #H
-elim (cpr_inv_appl1_simple … H ?) -H // #V0 #T0 #HV0 #HT0 #H destruct
+elim (cpr_inv_appl1_simple … H) -H // #V0 #T0 #HV0 #HT0 #H destruct
>(HV … HV0) -V0 >(HT … HT0) -T0 //
qed.