X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fcomputation%2Ffpbs_lift.ma;h=ab8f6608d9b4cace0c62a502604a68e5acbb137c;hb=07d915d411ffabeb0c7cd678f00cbeca53ae8276;hp=4895dccf546b7f55a84c7f812abbabe3fc9e4964;hpb=c69a33bba2ae2f37953737940fb45149136cf054;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/computation/fpbs_lift.ma b/matita/matita/contribs/lambdadelta/basic_2/computation/fpbs_lift.ma
index 4895dccf5..ab8f6608d 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/computation/fpbs_lift.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/computation/fpbs_lift.ma
@@ -28,3 +28,10 @@ lemma ssta_fpbs: ∀h,g,G,L,T,U,l.
                  ⦃G, L⦄ ⊢ T ▪[h, g] l+1 → ⦃G, L⦄ ⊢ T •[h, g] U →
                  ⦃G, L, T⦄ ≥[h, g] ⦃G, L, U⦄.
 /4 width=2 by fpb_fpbs, ssta_fpb/ qed.
+
+(* Note: this is used in the closure proof *)
+lemma cpr_lpr_ssta_fpbs: ∀h,g,G,L1,L2,T1,T2,U2,l2.
+                         ⦃G, L1⦄ ⊢ T1 ➡ T2 → ⦃G, L1⦄ ⊢ ➡ L2 →
+                         ⦃G, L2⦄ ⊢ T2 ▪[h, g] l2+1 → ⦃G, L2⦄ ⊢ T2 •[h, g] U2 →
+                         ⦃G, L1, T1⦄ ≥[h, g] ⦃G, L2, U2⦄.
+/4 width=5 by fpbs_strap1, cpr_lpr_fpbs, ssta_cpx, fpb_cpx/ qed.