(* Properties with strong normalization for unbound rt-transition for terms *)
(* Basic_1: was just: nf2_sn3 *)
-lemma csx_cpre (h) (G) (L):
+lemma cpre_total_csx (h) (G) (L):
∀T1. ⦃G, L⦄ ⊢ ⬈*[h] 𝐒⦃T1⦄ → ∃T2. ⦃G, L⦄ ⊢ T1 ➡*[h] 𝐍⦃T2⦄.
#h #G #L #T1 #H
@(csx_ind … H) -T1 #T1 #_ #IHT1