X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_transition%2Flfpx_fqup.ma;h=1ad389cd4261d58b3d8f90910764f089646c80c5;hb=747b42f3b9aac5487047f57742f1fcf05b56b57d;hp=608907d5c3d8417e579eb9f23c5039fd3fbad3cc;hpb=5a81feec7b8c07a43e96d772431e06bad177ed8c;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/lfpx_fqup.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/lfpx_fqup.ma
index 608907d5c..1ad389cd4 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/lfpx_fqup.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/lfpx_fqup.ma
@@ -31,7 +31,7 @@ lemma lfpx_pair: ∀h,G,L,V1,V2. ⦃G, L⦄ ⊢ V1 ⬈[h] V2 →
 (* Advanced inversion lemmas ************************************************)
 
 lemma lfpx_inv_bind_void: ∀h,p,I,G,L1,L2,V,T. ⦃G, L1⦄ ⊢ ⬈[h, ⓑ{p,I}V.T] L2 →
-                          ⦃G, L1⦄ ⊢ ⬈[h, V] L2 ∧ ⦃G, L1.ⓧ⦄ ⊢ ⬈[h, T] L2.ⓧ.
+                          ∧∧ ⦃G, L1⦄ ⊢ ⬈[h, V] L2 & ⦃G, L1.ⓧ⦄ ⊢ ⬈[h, T] L2.ⓧ.
 /2 width=3 by lfxs_inv_bind_void/ qed-.
 
 (* Advanced forward lemmas **************************************************)