X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fdelayed_updating%2Freduction%2Fdfr.ma;h=3cdf0d47e9f63a9c1666d6a23b2c036c293dc2ac;hb=8d8863982ca95225551e9659ed431db046c34e81;hp=67c22257b0ba0f92ed2c218fbaa2e7573b6dd939;hpb=775ab35f714568dfcd672f0dd53a00e1ba7382cd;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma
index 67c22257b..3cdf0d47e 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma
@@ -28,7 +28,7 @@ include "ground/xoa/and_4.ma".
 definition dfr (p) (q): relation2 prototerm prototerm ≝
            λt1,t2. ∃∃b,n.
            let r ≝ p●𝗔◗b●𝗟◗q in
-           ∧∧ ⊗b ϵ 𝐁 & ❘q❘ = (↑[q]𝐢)@❨n❩ & r◖𝗱n ϵ t1 &
+           ∧∧ ⊗b ϵ 𝐁 & ∀f. ❘q❘ = (↑[q]⫯f)@❨n❩ & r◖𝗱n ϵ t1 &
               t1[⋔r←𝛗n.(t1⋔(p◖𝗦))] ⇔ t2
 .