(* Properties with sort-irrelevant equivalence for terms ********************)
lemma tdeq_fdeq: ∀T1,T2. T1 ≛ T2 →
- ∀G,L. ⦃G, L, T1⦄ ≛ ⦃G, L, T2⦄.
+ ∀G,L. ⦃G,L,T1⦄ ≛ ⦃G,L,T2⦄.
/2 width=1 by fdeq_intro_sn/ qed.
(* Advanced properties ******************************************************)