+++ /dev/null
-(**************************************************************************)
-(* ___ *)
-(* ||M|| *)
-(* ||A|| A project by Andrea Asperti *)
-(* ||T|| *)
-(* ||I|| Developers: *)
-(* ||T|| The HELM team. *)
-(* ||A|| http://helm.cs.unibo.it *)
-(* \ / *)
-(* \ / This file is distributed under the terms of the *)
-(* v GNU General Public License Version 2 *)
-(* *)
-(**************************************************************************)
-
-include "basic_2/notation/relations/suptermopt_6.ma".
-include "basic_2/notation/relations/suptermopt_7.ma".
-include "basic_2/s_transition/fqu.ma".
-
-(* OPTIONAL SUPCLOSURE ******************************************************)
-
-(* Basic_2A1: was: fquqa *)
-(* Basic_2A1: includes: fquq_inv_gen *)
-definition fquq: bool → tri_relation genv lenv term ≝
- λb. tri_RC … (fqu b).
-
-interpretation
- "extended optional structural successor (closure)"
- 'SupTermOpt b G1 L1 T1 G2 L2 T2 = (fquq b G1 L1 T1 G2 L2 T2).
-
-interpretation
- "optional structural successor (closure)"
- 'SupTermOpt G1 L1 T1 G2 L2 T2 = (fquq true G1 L1 T1 G2 L2 T2).
-
-(* Basic properties *********************************************************)
-
-(* Basic_2A1: includes: fquqa_refl *)
-lemma fquq_refl: ∀b. tri_reflexive … (fquq b).
-// qed.
-
-lemma fqu_fquq: ∀b,G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ⊐[b] ⦃G2, L2, T2⦄ → ⦃G1, L1, T1⦄ ⊐⸮[b] ⦃G2, L2, T2⦄.
-/2 width=1 by or_introl/ qed.
-
-(* Basic_2A1: removed theorems 8:
- fquq_lref_O fquq_pair_sn fquq_bind_dx fquq_flat_dx fquq_drop
- fquqa_drop fquq_fquqa fquqa_inv_fquq
-*)