update in basic_2

[helm.git] / matita / matita / contribs / lambdadelta / basic_1 / nf2 / defs.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_1/nf2/defs.ma b/matita/matita/contribs/lambdadelta/basic_1/nf2/defs.ma
index eae14f72809c6caf51db3ac02ef8d52cb15ad84b..5b4849d7a76b064657ae80664433c0925b8b1dae 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_1/nf2/defs.ma
+++ b/matita/matita/contribs/lambdadelta/basic_1/nf2/defs.ma
@@ -22,6 +22,6 @@ definition nf2:
  \lambda (c: C).(\lambda (t1: T).(\forall (t2: T).((pr2 c t1 t2) \to (eq T t1 
 t2)))).
 
-let rec nfs2 (c: C) (ts: TList) on ts: Prop \def match ts with [TNil 
+rec definition nfs2 (c: C) (ts: TList) on ts: Prop \def match ts with [TNil 
 \Rightarrow True | (TCons t ts0) \Rightarrow (land (nf2 c t) (nfs2 c ts0))].