X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fdelayed_updating%2Freduction%2Fdfr.ma;h=ed077ae2cc772df22b7227dab1750ace5c243afd;hb=cfd201c62dd9b854bfb4ada648d3e556b29fac3a;hp=3dca53142fb3a3e6fabc1d31a0fd34f1795831d1;hpb=55ea9387fd71564c629fe3f47fd9bac59c4befb9;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 3dca53142..ed077ae2c 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma
@@ -15,17 +15,18 @@
 include "delayed_updating/syntax/path_depth.ma".
 include "delayed_updating/syntax/path_structure.ma".
 include "delayed_updating/syntax/path_balanced.ma".
+include "delayed_updating/syntax/prototerm_constructors.ma".
 include "delayed_updating/substitution/fsubst.ma".
 include "delayed_updating/notation/relations/black_rightarrow_df_4.ma".
 
 (* DELAYED FOCUSED REDUCTION ************************************************)
 
-inductive dfr (p) (q) (t): predicate preterm ≝
+inductive dfr (p) (q) (t): predicate prototerm ≝
 | dfr_beta (b):
-  let r ≝ p●𝗔◗b●𝗟◗q◖𝗱(↑❘q❘) in
-  r ϵ t → ⊓(⊗b) → dfr p q t (t[⋔r←t⋔(p◖𝗦)])
+  let r ≝ p●𝗔◗b●𝗟◗q in
+  r◖𝗱(↑❘q❘) ϵ t → ⊓(⊗b) → dfr p q t (t[⋔r←𝛗(↑❘q❘).t⋔(p◖𝗦)])
 .
 
 interpretation
-  "focused balanced reduction with delayed updating (preterm)"
+  "focused balanced reduction with delayed updating (prototerm)"
   'BlackRightArrowDF t1 p q t2 = (dfr p q t1 t2).