update in basic_2

[helm.git] / matita / matita / contribs / lambdadelta / basic_1 / arity / lift1.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_1/arity/lift1.ma b/matita/matita/contribs/lambdadelta/basic_1/arity/lift1.ma
index 72dd176afbab294fa963a2fbda32e94a4ae708f5..7267b7817b707c5655765ac06954c23fec683a61 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_1/arity/lift1.ma
+++ b/matita/matita/contribs/lambdadelta/basic_1/arity/lift1.ma
@@ -18,7 +18,7 @@ include "basic_1/arity/props.ma".
 
 include "basic_1/drop1/fwd.ma".
 
-theorem arity_lift1:
+lemma arity_lift1:
  \forall (g: G).(\forall (a: A).(\forall (c2: C).(\forall (hds: 
 PList).(\forall (c1: C).(\forall (t: T).((drop1 hds c1 c2) \to ((arity g c2 t 
 a) \to (arity g c1 (lift1 hds t) a))))))))