X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fdelayed_updating%2Freduction%2Fifr.ma;h=2a6553d9d0dd428614c7fdb648ad3e2eff9e8261;hb=7008128d354c6e998a87bc2febe9f86ea714869c;hp=92512b342ed50449745aa0fdec371d10bad5621e;hpb=829e3a8af3229c4e625245f7265dd67939da98c4;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr.ma b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr.ma
index 92512b342..2a6553d9d 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr.ma
@@ -25,8 +25,8 @@ include "ground/xoa/ex_4_3.ma".
 definition ifr (r): relation2 prototerm prototerm ≝
            λt1,t2.
            ∃∃p,q,n. p●𝗔◗𝗟◗q = r &
-           q ϵ 𝐂❨n❩ & r◖𝗱↑n ϵ t1 &
-           t1[⋔r←↑[𝐮❨↑n❩](t1⋔(p◖𝗦))] ⇔ t2
+           q ϵ 𝐂❨Ⓕ,n❩ & r◖𝗱↑n ϵ t1 &
+           t1[⋔r←🠡[𝐮❨↑n❩](t1⋔(p◖𝗦))] ⇔ t2
 .
 
 interpretation