(* CONTEXT-SENSITIVE EXTENDED NORMAL TERMS **********************************)
-(* Advanced properties ******************************************************)
-
-lemma cnx_lref_atom: ∀h,g,G,L,i. ⇩[i] L ≡ ⋆ → ⦃G, L⦄ ⊢ ➡[h, g] 𝐍⦃#i⦄.
-#h #g #G #L #i #HL #X #H
-elim (cpx_inv_lref1 … H) -H // *
-#I #K #V1 #V2 #HLK #_ #_
-lapply (ldrop_mono … HL … HLK) -L #H destruct
-qed.
-
(* Relocation properties ****************************************************)
lemma cnx_lift: ∀h,g,G,L0,L,T,T0,s,d,e. ⦃G, L⦄ ⊢ ➡[h, g] 𝐍⦃T⦄ → ⇩[s, d, e] L0 ≡ L →