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 3cdf0d47e9f63a9c1666d6a23b2c036c293dc2ac..e118134dd450a7bfcc2a49c6865b250a62c90d05 100644 (file)
--- a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma
@@ -20,6 +20,7 @@ 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".
 
@@ -28,8 +29,8 @@ 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
-           â\88§â\88§ â\8a\97b ϵ ð\9d\90\81 & â\88\80f. â\9d\98qâ\9d\98 = (â\86\91[q]⫯f)@❨n❩ & r◖𝗱n ϵ t1 &
-              t1[⋔r←𝛗n.(t1⋔(p◖𝗦))] ⇔ t2
+           â\88§â\88§ â\8a\97b ϵ ð\9d\90\81 & â\88\80f. â\86\91â\9d\98qâ\9d\98 = (â\86\91[q]f)@❨n❩ & r◖𝗱n ϵ t1 &
+              t1[⋔r←𝛗(n+❘b❘).(t1⋔(p◖𝗦))] ⇔ t2
 .
 
 interpretation