update in delayed_updating

[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 e118134dd450a7bfcc2a49c6865b250a62c90d05..849c5f32dfd76fa5b3d257c2936d118dad9612fd 100644 (file)
--- a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma
@@ -12,15 +12,14 @@
 (*                                                                        *)
 (**************************************************************************)
 
+include "delayed_updating/unwind1/unwind.ma".
+include "delayed_updating/substitution/fsubst.ma".
 include "delayed_updating/syntax/prototerm_constructors.ma".
 include "delayed_updating/syntax/prototerm_equivalence.ma".
-include "delayed_updating/substitution/fsubst.ma".
-include "delayed_updating/substitution/lift.ma".
 include "delayed_updating/syntax/path_structure.ma".
 include "delayed_updating/syntax/path_balanced.ma".
 include "delayed_updating/syntax/path_depth.ma".
 include "delayed_updating/notation/relations/black_rightarrow_df_4.ma".
-include "ground/arith/nat_rplus.ma".
 include "ground/xoa/ex_1_2.ma".
 include "ground/xoa/and_4.ma".
 
@@ -29,8 +28,8 @@ 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 & ∀f. ↑❘q❘ = (↑[q]f)@❨n❩ & r◖𝗱n ϵ t1 &
-              t1[â\8b\94râ\86\90ð\9d\9b\97(n+â\9d\98bâ\9d\98).(t1⋔(p◖𝗦))] ⇔ t2
+           ∧∧ (⊗b ϵ 𝐁 ∧ 𝟎 = ♭b) & ↑♭q = (▼[r]𝐢)@❨n❩ & r◖𝗱n ϵ t1 &
+              t1[â\8b\94râ\86\90ð\9d\9b\97(n+â\99­b).(t1⋔(p◖𝗦))] ⇔ t2
 .
 
 interpretation