update in basic_2

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / rt_transition / cpx_feqx.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpx_feqx.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpx_feqx.ma
index a0ec5d8f8eff632034d892359dabe805cba68139..333a402d309db4675a0ed5318d9d69052afa1310 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpx_feqx.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpx_feqx.ma
@@ -20,14 +20,15 @@ include "basic_2/rt_transition/rpx_reqx.ma".
 
 (* Properties with sort-irrelevant equivalence for closures *****************)
 
+(**) (* to update *)
 lemma feqx_cpx_trans:
       ∀G1,G2,L1,L2,T1,T. ❪G1,L1,T1❫ ≛ ❪G2,L2,T❫ →
       ∀T2. ❪G2,L2❫ ⊢ T ⬈ T2 →
       ∃∃T0. ❪G1,L1❫ ⊢ T1 ⬈ T0 & ❪G1,L1,T0❫ ≛ ❪G2,L2,T2❫.
 #G1 #G2 #L1 #L2 #T1 #T #H #T2 #HT2
 elim (feqx_inv_gen_dx … H) -H #H #HL12 #HT1 destruct
-elim (reqx_cpx_trans … HL12 … HT2) #T0 #HT0 #HT02
-lapply (cpx_reqx_conf_dx … HT2 … HL12) -HL12 #HL12
-elim (teqx_cpx_trans … HT1 … HT0) -T #T #HT1 #HT0
-/4 width=5 by feqx_intro_dx, teqx_trans, ex2_intro/
+lapply (reqx_cpx_trans … HL12 … HT2) #H
+lapply (cpx_reqx_conf_dx … HT2 … HL12) -HT2 -HL12 #HL12
+lapply (teqx_cpx_trans … HT1 … H) -T #HT12
+/3 width=3 by feqx_intro_dx, ex2_intro/
 qed-.