X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fdelayed_updating%2Fsyntax%2Fpath.ma;h=2d8abe30451f25628141476a53cf2fb629dd2a44;hb=775ab35f714568dfcd672f0dd53a00e1ba7382cd;hp=69355961ccf67b1047f9a68066ecba2f38bb9917;hpb=aefe567225f573b19d341da29fd7a2e6d5ee3105;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/syntax/path.ma b/matita/matita/contribs/lambdadelta/delayed_updating/syntax/path.ma
index 69355961c..2d8abe304 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/syntax/path.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/syntax/path.ma
@@ -12,14 +12,30 @@
 (*                                                                        *)
 (**************************************************************************)
 
-include "ground/lib/list.ma".
-include "delayed_updating/notation/functions/element_e_0.ma".
+include "ground/lib/list_rcons.ma".
+include "ground/notation/functions/element_e_0.ma".
+include "ground/notation/functions/black_circle_2.ma".
+include "ground/notation/functions/black_halfcircleright_2.ma".
+include "ground/notation/functions/black_halfcircleleft_2.ma".
 include "delayed_updating/syntax/label.ma".
 
 (* PATH *********************************************************************)
 
+(* Note: a path is a list of labels *) 
 definition path ≝ list label.
 
 interpretation
   "empty (paths)"
-  'ElementE = (list_nil label).
+  'ElementE = (list_empty label).
+
+interpretation
+  "left cons (paths)"
+  'BlackHalfCircleRight l p = (list_lcons label l p).
+
+interpretation
+  "append (paths)"
+  'BlackCircle l1 l2 = (list_append label l1 l2).
+
+interpretation
+  "right cons (paths)"
+  'BlackHalfCircleLeft p l = (list_append label p (list_lcons label l (list_empty label))).