X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fdelayed_updating%2Freduction%2Fifr.ma;h=fcc12edbf1c925c643b3e0839e3e13e41281c18b;hb=a4cacf8e269910184348a037106551dbc8a46fd4;hp=4e70a6c43212df751914c4ee2321a32997ba6acf;hpb=ad6182251b8192ee7d25c53156afbce35e3715b6;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr.ma b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr.ma
index 4e70a6c43..fcc12edbf 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr.ma
@@ -12,13 +12,11 @@
 (*                                                                        *)
 (**************************************************************************)
 
+include "delayed_updating/unwind/unwind2_prototerm.ma".
 include "delayed_updating/substitution/fsubst.ma".
-include "delayed_updating/substitution/lift_prototerm.ma".
-include "delayed_updating/syntax/prototerm_equivalence.ma".
+include "delayed_updating/syntax/prototerm_eq.ma".
 include "delayed_updating/syntax/path_head.ma".
-include "delayed_updating/syntax/path_depth.ma".
-include "delayed_updating/syntax/path_reverse.ma".
-include "delayed_updating/notation/relations/black_rightarrow_f_4.ma".
+include "delayed_updating/notation/relations/black_rightarrow_if_4.ma".
 
 (* IMMEDIATE FOCUSED REDUCTION ************************************************)
 
@@ -26,9 +24,9 @@ definition ifr (p) (q): relation2 prototerm prototerm ≝
            λt1,t2. ∃n:pnat.
            let r ≝ p●𝗔◗𝗟◗q in
            ∧∧ (𝗟◗q)ᴿ = ↳[n](rᴿ) & r◖𝗱n ϵ t1 &
-              t1[⋔r←↑[𝐮❨♭(𝗟◗q)❩](t1⋔(p◖𝗦))] ⇔ t2
+              t1[⋔r←▼[𝐮❨n❩](t1⋔(p◖𝗦))] ⇔ t2
 .
 
 interpretation
-  "focused balanced reduction with immediate updating (prototerm)"
-  'BlackRightArrowF t1 p q t2 = (ifr p q t1 t2).
+  "focused reduction with immediate updating (prototerm)"
+  'BlackRightArrowIF t1 p q t2 = (ifr p q t1 t2).