X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fground%2Flib%2Fstream_tls.ma;h=b2f042c1f20faeae78cba32d601ea94e3952b311;hb=8bbe582d87984526f40182c4409cbfd43108cb79;hp=9f34ba81d06f5b1a723571a005b11f2be8f22654;hpb=6604a232815858a6c75dd25ac45abd68438077ff;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/ground/lib/stream_tls.ma b/matita/matita/contribs/lambdadelta/ground/lib/stream_tls.ma
index 9f34ba81d..b2f042c1f 100644
--- a/matita/matita/contribs/lambdadelta/ground/lib/stream_tls.ma
+++ b/matita/matita/contribs/lambdadelta/ground/lib/stream_tls.ma
@@ -12,7 +12,7 @@
 (*                                                                        *)
 (**************************************************************************)
 
-include "ground/notation/functions/downspoonstar_3.ma".
+include "ground/notation/functions/downharpoonrightstar_3.ma".
 include "ground/lib/stream_hdtl.ma".
 include "ground/arith/nat_succ_iter.ma".
 
@@ -23,32 +23,26 @@ definition stream_tls (A) (n): stream A → stream A ≝
 
 interpretation
   "iterated tail (strams)"
-  'DownSpoonStar A n f = (stream_tls A n f).
+  'DownHarpoonRightStar A n f = (stream_tls A n f).
 
 (* Basic constructions ******************************************************)
 
 lemma stream_tls_zero (A) (t):
-      t = ⫰*{A}[𝟎]t.
+      t = ⇂*{A}[𝟎]t.
 // qed.
 
 lemma stream_tls_tl (A) (n) (t):
-      (â«°â«°*[n]t) = â«°*{A}[n]â«°t.
+      (⇂⇂*[n]t) = ⇂*{A}[n]⇂t.
 #A #n #t
 @(niter_appl … (stream_tl …))
 qed.
 
 lemma stream_tls_succ (A) (n) (t):
-      (⫰⫰*[n]t) = ⫰*{A}[↑n]t.
+      (⇂⇂*[n]t) = ⇂*{A}[↑n]t.
 #A #n #t
 @(niter_succ … (stream_tl …))
 qed.
 
 lemma stream_tls_swap (A) (n) (t):
-      (⫰*[n]⫰t) = ⫰*{A}[↑n]t.
+      (⇂*[n]⇂t) = ⇂*{A}[↑n]t.
 // qed.
-
-lemma stream_tls_eq_repl (A) (n):
-      stream_eq_repl A (λt1,t2. ⫰*[n] t1 ≗ ⫰*[n] t2).
-#A #n @(nat_ind_succ … n) -n //
-#n #IH * #n1 #t1 * #n2 #t2 #H elim (stream_eq_inv_cons … H) /2 width=7 by/
-qed.