X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fcomputation%2Flsubc_drops.ma;h=088cd210d403d49e2c047d69c458146bb27f6844;hb=43282d3750af8831c8100c60d75c56fdfb7ff3c9;hp=3f53eb54d5365a432a428c6cac3303b9ddd3f372;hpb=6c985e4e2e7846a2b9abd0c84569f21c24e9ce2f;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/computation/lsubc_drops.ma b/matita/matita/contribs/lambdadelta/basic_2/computation/lsubc_drops.ma
index 3f53eb54d..088cd210d 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/computation/lsubc_drops.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/computation/lsubc_drops.ma
@@ -20,8 +20,8 @@ include "basic_2/computation/lsubc_drop.ma".
 
 (* Basic_1: was: csubc_drop1_conf_rev *)
 lemma drops_lsubc_trans: ∀RR,RS,RP. gcp RR RS RP →
-                         ∀G,L1,K1,des. ⇩*[Ⓕ, des] L1 ≡ K1 → ∀K2. G ⊢ K1 ⫃[RP] K2 →
-                         ∃∃L2. G ⊢ L1 ⫃[RP] L2 & ⇩*[Ⓕ, des] L2 ≡ K2.
+                         ∀G,L1,K1,des. ⬇*[Ⓕ, des] L1 ≡ K1 → ∀K2. G ⊢ K1 ⫃[RP] K2 →
+                         ∃∃L2. G ⊢ L1 ⫃[RP] L2 & ⬇*[Ⓕ, des] L2 ≡ K2.
 #RR #RS #RP #Hgcp #G #L1 #K1 #des #H elim H -L1 -K1 -des
 [ /2 width=3 by drops_nil, ex2_intro/
 | #L1 #L #K1 #des #d #e #_ #HLK1 #IHL #K2 #HK12