partial commit in delayed_updating

[helm.git] / matita / matita / contribs / lambdadelta / delayed_updating / syntax / path.ma

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/syntax/path.ma b/matita/matita/contribs/lambdadelta/delayed_updating/syntax/path.ma
index 2d8abe30451f25628141476a53cf2fb629dd2a44..39ac9c46cadac95f0e179703cb87c55081337c90 100644 (file)
--- a/matita/matita/contribs/lambdadelta/delayed_updating/syntax/path.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/syntax/path.ma
@@ -21,7 +21,8 @@ include "delayed_updating/syntax/label.ma".
 
 (* PATH *********************************************************************)
 
-(* Note: a path is a list of labels *) 
+(* Note: a path is a list of labels *)
+(* Note: constructed from the leaf (right end) to the root (left end) *)
 definition path ≝ list label.
 
 interpretation
@@ -29,13 +30,13 @@ interpretation
   'ElementE = (list_empty label).
 
 interpretation
-  "left cons (paths)"
-  'BlackHalfCircleRight l p = (list_lcons label l p).
+  "right cons (paths)"
+  'BlackHalfCircleLeft p l = (list_lcons label l p).
 
 interpretation
   "append (paths)"
-  'BlackCircle l1 l2 = (list_append label l1 l2).
+  'BlackCircle p q = (list_append label q p).
 
 interpretation
-  "right cons (paths)"
-  'BlackHalfCircleLeft p l = (list_append label p (list_lcons label l (list_empty label))).
+  "left cons (paths)"
+  'BlackHalfCircleRight l p = (list_append label p (list_lcons label l (list_empty label))).