update in delayed_updating and ground

[helm.git] / matita / matita / contribs / lambdadelta / delayed_updating / reduction / dfr.ma

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma
index 27468022ad4c4e22109173830d80a04d6498f657..8e26b62b9c4f7219b31d0285583859c084cf5195 100644 (file)
--- a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma
@@ -24,7 +24,7 @@ include "ground/xoa/ex_4_3.ma".
 definition dfr (r): relation2 prototerm prototerm ≝
            λt1,t2.
            ∃∃p,q,n. p●𝗔◗𝗟◗q = r &
-           q ϵ 𝐂❨n❩ & r◖𝗱↑n ϵ t1 &
+           q ϵ 𝐂❨Ⓕ,n❩ & r◖𝗱↑n ϵ t1 &
            t1[⋔r←𝛕↑n.(t1⋔(p◖𝗦))] ⇔ t2
 .