+++ /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/static/ffdeq.ma".
-include "basic_2/rt_transition/cpx_lfdeq.ma".
-include "basic_2/rt_transition/lfpx_lfdeq.ma".
-
-(* UNBOUND CONTEXT-SENSITIVE PARALLEL RT-TRANSITION FOR TERMS ***************)
-
-(* Properties with degree-based equivalence for closures ********************)
-
-lemma ffdeq_cpx_trans: ∀h,o,G1,G2,L1,L2,T1,T. ⦃G1, L1, T1⦄ ≛[h, o] ⦃G2, L2, T⦄ →
- ∀T2. ⦃G2, L2⦄ ⊢ T ⬈[h] T2 →
- ∃∃T0. ⦃G1, L1⦄ ⊢ T1 ⬈[h] T0 & ⦃G1, L1, T0⦄ ≛[h, o] ⦃G2, L2, T2⦄.
-#h #o #G1 #G2 #L1 #L2 #T1 #T #H #T2 #HT2
-elim (ffdeq_inv_gen_dx … H) -H #H #HL12 #HT1 destruct
-elim (lfdeq_cpx_trans … HL12 … HT2) #T0 #HT0 #HT02
-lapply (cpx_lfdeq_conf_dx … HT2 … HL12) -HL12 #HL12
-elim (tdeq_cpx_trans … HT1 … HT0) -T #T #HT1 #HT0
-/4 width=5 by ffdeq_intro_dx, tdeq_trans, ex2_intro/
-qed-.