X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambda_delta%2FBasic_2%2Funfold%2Fltpss.ma;h=eb02c3a0614fbc52597bfb0136afb6d2f9f17a77;hb=fc7af5f9ea2cd4a876b8babc6b691136799e3c87;hp=456a3aae092175e57197acb75539f1faecf08870;hpb=04f6ca789cac88220234a3bdfb497844c417ef14;p=helm.git

diff --git a/matita/matita/contribs/lambda_delta/Basic_2/unfold/ltpss.ma b/matita/matita/contribs/lambda_delta/Basic_2/unfold/ltpss.ma
index 456a3aae0..eb02c3a06 100644
--- a/matita/matita/contribs/lambda_delta/Basic_2/unfold/ltpss.ma
+++ b/matita/matita/contribs/lambda_delta/Basic_2/unfold/ltpss.ma
@@ -25,7 +25,7 @@ interpretation "partial unfold (local environment)"
 
 (* Basic eliminators ********************************************************)
 
-lemma ltpss_ind: ∀d,e,L1. ∀R: lenv → Prop. R L1 →
+lemma ltpss_ind: ∀d,e,L1. ∀R:predicate lenv. R L1 →
                  (∀L,L2. L1 [d, e] ≫* L → L [d, e] ≫ L2 → R L → R L2) →
                  ∀L2. L1 [d, e] ≫* L2 → R L2.
 #d #e #L1 #R #HL1 #IHL1 #L2 #HL12 @(TC_star_ind … HL1 IHL1 … HL12) //