include "basic_1/iso/props.ma".
-theorem nf2_iso_appls_lref:
+lemma nf2_iso_appls_lref:
\forall (c: C).(\forall (i: nat).((nf2 c (TLRef i)) \to (\forall (vs:
TList).(\forall (u: T).((pr3 c (THeads (Flat Appl) vs (TLRef i)) u) \to (iso
(THeads (Flat Appl) vs (TLRef i)) u))))))