X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_transition%2Fcpx_lsubr.ma;h=58350fb86e2f48963106c1bc6df07e53c9a34e4d;hb=9323611e3819c1382b872a7ada00264991f36217;hp=c2e3d8ad7d8c96600d1567bb23317b444b332e8c;hpb=f694e3336cbdabdeefd86f85d827edfd26bf3464;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpx_lsubr.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpx_lsubr.ma
index c2e3d8ad7..58350fb86 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpx_lsubr.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpx_lsubr.ma
@@ -17,6 +17,14 @@ include "basic_2/rt_transition/cpx.ma".
 
 (* UNCOUNTED CONTEXT-SENSITIVE PARALLEL RT-TRANSITION FOR TERMS *************)
 
+(* Properties with restricted refinement for local environments *************)
+
 lemma lsubr_cpx_trans: ∀h,G. lsub_trans … (cpx h G) lsubr.
 #h #G #L1 #T1 #T2 * /3 width=4 by lsubr_cpg_trans, ex_intro/
 qed-.
+
+lemma cpx_bind_unit: ∀h,L,G,V1,V2. ⦃G, L⦄ ⊢ V1 ⬈[h] V2 →
+                     ∀J,T1,T2. ⦃G, L.ⓤ{J}⦄ ⊢ T1 ⬈[h] T2 →
+                     ∀p,I. ⦃G, L⦄ ⊢ ⓑ{p,I}V1.T1 ⬈[h] ⓑ{p,I}V2.T2.
+/4 width=4 by lsubr_cpx_trans, cpx_bind, lsubr_unit/ qed.
+