milestone update in ground, partial commit

[helm.git] / matita / matita / contribs / lambdadelta / ground / arith / nat_succ_iter.ma

diff --git a/matita/matita/contribs/lambdadelta/ground/arith/nat_succ_iter.ma b/matita/matita/contribs/lambdadelta/ground/arith/nat_succ_iter.ma
index 63031d93599d1eed24d94dfcd9d0286715cdb38b..7f47f9158fd05d3ecd8651079bafed31db362f4d 100644 (file)
--- a/matita/matita/contribs/lambdadelta/ground/arith/nat_succ_iter.ma
+++ b/matita/matita/contribs/lambdadelta/ground/arith/nat_succ_iter.ma
@@ -20,6 +20,6 @@ include "ground/arith/nat_succ.ma".
 (* Constructions with niter *************************************************)
 
 (*** iter_S *)
-lemma niter_succ (A) (f) (n) (a): f (f^n a) = f^{A}(↑n) a.
+lemma niter_succ (A) (f) (n): f ∘ f^n ≐ f^{A}(↑n).
 #A #f * //
 qed.