X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_computation%2Fcsx_gcp.ma;h=716032c859f208b85a488c4782e72033dca7bd39;hp=ead714a3229ea919f5ffa4527b284bd9e2d95e30;hb=b4283c079ed7069016b8d924bbc7e08872440829;hpb=647b419e96770d90a82d7a9e5e8843566a9f93ee

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/csx_gcp.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/csx_gcp.ma
index ead714a32..716032c85 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/csx_gcp.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/csx_gcp.ma
@@ -23,7 +23,7 @@ include "basic_2/rt_computation/csx_drops.ma".
 theorem csx_gcp: ∀h. gcp (cpx h) tdeq (csx h).
 #h @mk_gcp
 [ normalize /3 width=13 by cnx_lifts/
-| /3 width=5 by O, cnx_sort, ex_intro/
+| /2 width=4 by cnx_sort/
 | /2 width=8 by csx_lifts/
 | /2 width=3 by csx_fwd_flat_dx/
 ]