From: Ferruccio Guidi <ferruccio.guidi@unibo.it>
Date: Thu, 9 Jun 2022 13:39:52 +0000 (+0200)
Subject: update in delayed_updating
X-Git-Tag: make_still_working~61
X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=commitdiff_plain;h=f5b6fd3125c0aefa1db23fbdd23b887fa964f385

update in delayed_updating

+ bug fixed in ifr allows to prove ifr_unwind_bi
---

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma
index 7ae112491..0a4b7cf1f 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr.ma
@@ -30,5 +30,5 @@ definition dfr (p) (q): relation2 prototerm prototerm ≝
 .
 
 interpretation
-  "focused balanced reduction with delayed updating (prototerm)"
+  "focused reduction with delayed updating (prototerm)"
   'BlackRightArrowDF t1 p q t2 = (dfr p q t1 t2).
diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr.ma b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr.ma
index 90cd693c3..6469bb2a0 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr.ma
@@ -16,7 +16,6 @@ include "delayed_updating/unwind/unwind2_prototerm.ma".
 include "delayed_updating/substitution/fsubst.ma".
 include "delayed_updating/syntax/prototerm_equivalence.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".
 
@@ -26,9 +25,9 @@ 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)"
+  "focused reduction with immediate updating (prototerm)"
   'BlackRightArrowF t1 p q t2 = (ifr p q t1 t2).
diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr_unwind.ma b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr_unwind.ma
index 9bd4cd7c4..21e4ac27f 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr_unwind.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr_unwind.ma
@@ -32,9 +32,9 @@ include "delayed_updating/syntax/path_depth_reverse.ma".
 
 (* Constructions with unwind ************************************************)
 
-theorem ifr_unwind_bi (f) (p) (q) (t1) (t2):
-        t1 ϵ 𝐓 → t1⋔(p◖𝗦) ⧸≬ 𝐈 →
-        t1 ➡𝐟[p,q] t2 → ▼[f]t1 ➡𝐟[⊗p,⊗q] ▼[f]t2.
+lemma ifr_unwind_bi (f) (p) (q) (t1) (t2):
+      t1 ϵ 𝐓 → t1⋔(p◖𝗦) ⧸≬ 𝐈 →
+      t1 ➡𝐟[p,q] t2 → ▼[f]t1 ➡𝐟[⊗p,⊗q] ▼[f]t2.
 #f #p #q #t1 #t2 #H1t1 #H2t1
 * #n * #H1n #Ht1 #Ht2
 @(ex_intro … (↑♭q)) @and3_intro