X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_computation%2Fcprs_drops.ma;fp=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_computation%2Fcprs_drops.ma;h=bbc0b19a5c53644ec28643e75c0bb5919773a3ed;hb=67fe9cec87e129a2a41c75d7ed8456a6f3314421;hp=bd1afeec3492043b8bf47e684b8862d7013e525e;hpb=86861e6f031df66824a381527dfe847029ff72bc;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/cprs_drops.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/cprs_drops.ma
index bd1afeec3..bbc0b19a5 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/cprs_drops.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/cprs_drops.ma
@@ -22,8 +22,8 @@ include "basic_2/rt_computation/cpms_drops.ma".
 (* Basic_2A1: was: cprs_inv_lref1 *)
 lemma cprs_inv_lref1_drops (h) (G): ∀L,T2,i. ⦃G,L⦄ ⊢ #i ➡*[h] T2 →
                                     ∨∨ T2 = #i
-                                     | ∃∃K,V1,T1. ⬇*[i] L ≘ K.ⓓV1 & ⦃G,K⦄ ⊢ V1 ➡*[h] T1 &
-                                                  ⬆*[↑i] T1 ≘ T2.
+                                     | ∃∃K,V1,T1. ⇩*[i] L ≘ K.ⓓV1 & ⦃G,K⦄ ⊢ V1 ➡*[h] T1 &
+                                                  ⇧*[↑i] T1 ≘ T2.
 #h #G #L #T2 #i #H elim (cpms_inv_lref1_drops … H) -H *
 [ /2 width=1 by or_introl/
 | /3 width=6 by ex3_3_intro, or_intror/