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 *)
13 (**************************************************************************)
15 include "basic_2/unwind/sstas_lsubss.ma".
16 include "basic_2/computation/dxprs.ma".
18 (* DECOMPOSED EXTENDED PARALLEL COMPUTATION ON TERMS ************************)
20 (* Properties on lenv ref for stratified type assignment ********************)
22 lemma lsubss_dxprs_trans: ∀h,g,L1,L2. h ⊢ L1 •⊑[g] L2 →
23 ∀T1,T2. ⦃h, L2⦄ ⊢ T1 •*➡*[g] T2 → ⦃h, L1⦄ ⊢ T1 •*➡*[g] T2.
24 #h #g #L1 #L2 #HL12 #T1 #T2 *
25 lapply (lsubss_fwd_lsubs2 … HL12) /3 width=5/