#f #t #n #p * #q #Hq #H0 destruct
elim (in_comp_inv_iref … Hq) -Hq #p #Hp #Ht destruct
/2 width=1 by in_comp_unwind2_path_term/
qed-.
lemma unwind2_term_iref (f) (t) (n:pnat):
#f #t #n #p * #q #Hq #H0 destruct
elim (in_comp_inv_iref … Hq) -Hq #p #Hp #Ht destruct
/2 width=1 by in_comp_unwind2_path_term/
qed-.
lemma unwind2_term_iref (f) (t) (n:pnat):