X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Flibrary%2Fdemo%2Fpropositional_sequent_calculus.ma;h=32e11054c5d19bdb699f77578b4fa60fd1c83154;hb=b47fe9c65af809ae5002de4ecca6fa64640b1aa0;hp=d79cd2e6ddded90916b5a01f48d00d305dafd225;hpb=aa14dc1ea55627bb92233adbce7662d0cf25b584;p=helm.git

diff --git a/helm/software/matita/library/demo/propositional_sequent_calculus.ma b/helm/software/matita/library/demo/propositional_sequent_calculus.ma
index d79cd2e6d..32e11054c 100644
--- a/helm/software/matita/library/demo/propositional_sequent_calculus.ma
+++ b/helm/software/matita/library/demo/propositional_sequent_calculus.ma
@@ -163,11 +163,10 @@ let rec and_of_list l ≝
   | cons F l' ⇒ FAnd F (and_of_list l')
   ].
 
-alias id "Nil" = "cic:/matita/list/list.ind#xpointer(1/1/1)".
 let rec or_of_list l ≝
  match l with
-  [ Nil ⇒ FFalse
-  | Cons F l' ⇒ FOr F (or_of_list l')
+  [ nil ⇒ FFalse
+  | cons F l' ⇒ FOr F (or_of_list l')
   ].
 
 definition formula_of_sequent ≝