WIP in delayed_updating

[helm.git] / matita / matita / contribs / lambdadelta / delayed_updating / reduction / dfr_ifr.ma

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr_ifr.ma b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr_ifr.ma
index 77e303f0504f8bb8bedd81afcb398beb5c424f0b..dd24f856863792f367b106e4354464ede5961645 100644 (file)
--- a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr_ifr.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr_ifr.ma
@@ -20,6 +20,7 @@ include "delayed_updating/unwind1/unwind_preterm_eq.ma".
 include "delayed_updating/unwind1/unwind_structure_depth.ma".
 include "delayed_updating/unwind1/unwind_depth.ma".
 include "delayed_updating/substitution/fsubst_eq.ma".
+include "delayed_updating/substitution/lift_prototerm_eq.ma".
 include "delayed_updating/syntax/prototerm_proper_constructors.ma".
 include "delayed_updating/syntax/path_structure_depth.ma".
 include "ground/relocation/tr_uni_compose.ma".
@@ -83,6 +84,11 @@ lemma dfr_unwind_id_bi (p) (q) (t1) (t2): t1 ϵ 𝐓 →
     <depth_append <depth_L_sn <depth_structure <depth_structure
     @fsubst_eq_repl [ // ]
     @(subset_eq_trans … (unwind_iref …))
+
+    elim Hb -Hb #Hb #H0 <H0 -H0 <nrplus_zero_dx <nplus_zero_dx <Hn
+    @(subset_eq_canc_sn … (lift_term_eq_repl_dx …))
+    [ @unwind_grafted_S /2 width=2 by ex_intro/ | skip ]
+
 (*
     @(subset_eq_canc_sn … (unwind_term_eq_repl_dx …))
     [ @unwind_grafted_S /2 width=2 by ex_intro/ | skip ]