update in ground

[helm.git] / matita / matita / contribs / lambdadelta / ground / relocation / tr_uni_compose.ma

diff --git a/matita/matita/contribs/lambdadelta/ground/relocation/tr_uni_compose.ma b/matita/matita/contribs/lambdadelta/ground/relocation/tr_uni_compose.ma
index 7d7aa437e147df279bdf4e626ccc0843ff611738..d278582f214984c06fb1f6579f15331151c28bce 100644 (file)
--- a/matita/matita/contribs/lambdadelta/ground/relocation/tr_uni_compose.ma
+++ b/matita/matita/contribs/lambdadelta/ground/relocation/tr_uni_compose.ma
@@ -29,6 +29,12 @@ qed.
 
 (* Constructions with tr_compose and tr_tls *********************************)
 
+lemma tr_tls_compose_uni_sn (f) (n) (p:pnat):
+      ⇂*[p]f ≗ ⇂*[p](𝐮❨n❩∘f).
+#f #n #p elim p -p //
+#p #IH /2 width=1 by stream_tl_eq_repl/
+qed.
+
 lemma tr_tl_compose_uni_dx (f) (n):
       ⇂*[↑n]f ≗ ⇂(f∘𝐮❨n❩).
 // qed.
@@ -44,8 +50,8 @@ qed.
 
 (* Main constructions with tr_compose and tr_tls ****************************)
 
-theorem tr_compose_uni_dx (f) (n):
-        (𝐮❨f@❨n❩❩∘⇂*[n]f ≗ f∘𝐮❨n❩).
+theorem tr_compose_uni_dx (f) (p):
+        (𝐮❨f@❨p❩❩∘⇂*[p]f) ≗ f∘𝐮❨p❩.
 #f #p
 @nstream_eq_inv_ext #q
 <tr_compose_pap <tr_compose_pap