1 (**************************************************************************)
4 (* ||A|| A project by Andrea Asperti *)
6 (* ||I|| Developers: *)
7 (* ||T|| The HELM team. *)
8 (* ||A|| http://helm.cs.unibo.it *)
10 (* \ / This file is distributed under the terms of the *)
11 (* v GNU General Public License Version 2 *)
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15 include "static_2/static/feqg_fqu.ma".
16 include "basic_2/rt_transition/fpb_fqup.ma".
17 include "basic_2/rt_transition/fpbc.ma".
19 (* PROPER PARALLEL RST-TRANSITION FOR CLOSURES ******************************)
21 (* Advanced properties ******************************************************)
23 (* Basic_2A1: uses: fpb_cpx *)
24 lemma cpx_fpbc (G) (L):
25 ∀T1,T2. ❨G,L❩ ⊢ T1 ⬈ T2 → (T1 ≅ T2 → ⊥) → ❨G,L,T1❩ ≻ ❨G,L,T2❩.
26 /4 width=5 by fpbc_intro, cpx_fpb, feqg_fwd_teqg/ qed.
28 (* Basic_2A1: uses: fpb_fqu *)
29 lemma fqu_fpbc (G1) (G2) (L1) (L2) (T1) (T2):
30 ❨G1,L1,T1❩ ⬂ ❨G2,L2,T2❩ → ❨G1,L1,T1❩ ≻ ❨G2,L2,T2❩.
31 /4 width=10 by fpbc_intro, fquq_fpb, fqu_fquq, fqu_fneqg/ qed.