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/s_computation/fqup_drops.ma".
16 include "static_2/s_computation/fqus_fqup.ma".
18 (* STAR-ITERATED SUPCLOSURE *************************************************)
20 (* Properties with generic slicing for local environments *******************)
22 lemma fqus_drops: ∀b,G,L,K,T,U,i. ⇩*[i] L ≘ K → ⇧*[i] T ≘ U →
23 ⦃G,L,U⦄ ⬂*[b] ⦃G,K,T⦄.
24 #b #G #L #K #T #U * /3 width=3 by fqup_drops_succ, fqup_fqus/
25 #HLK #HTU <(lifts_fwd_isid … HTU) -U // <(drops_fwd_isid … HLK) -K //