-lemma unwind2_term_iref_dx (f) (t) (n:pnat):
- â\96¼[f](ð\9d\9b\97n.t) â\8a\86 â\96¼[fâ\88\98ð\9d\90®â\9d¨n❩]t.
-#f #t #n #p * #q #Hq #H0 destruct
+lemma unwind2_term_iref_dx (f) (t) (k:pnat):
+ â\96¼[f](ð\9d\9b\95k.t) â\8a\86 â\96¼[fâ\88\98ð\9d\90®â\9d¨k❩]t.
+#f #t #k #p * #q #Hq #H0 destruct