matita/matita/contribs/lambdadelta/basic_2/etc/lsubss/dxprs_lsubss.etc

   1 (**************************************************************************)
   2 (*       ___                                                              *)
   3 (*      ||M||                                                             *)
   4 (*      ||A||       A project by Andrea Asperti                           *)
   5 (*      ||T||                                                             *)
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   9 (*      \   /                                                             *)
  10 (*       \ /        This file is distributed under the terms of the       *)
  11 (*        v         GNU General Public License Version 2                  *)
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  13 (**************************************************************************)
  14
  15 include "basic_2/unwind/sstas_lsubss.ma".
  16 include "basic_2/computation/dxprs.ma".
  17
  18 (* DECOMPOSED EXTENDED PARALLEL COMPUTATION ON TERMS ************************)
  19
  20 (* Properties on lenv ref for stratified type assignment ********************)
  21
  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/
  26 qed-.