+++ /dev/null
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-(* ___ *)
-(* ||M|| *)
-(* ||A|| A project by Andrea Asperti *)
-(* ||T|| *)
-(* ||I|| Developers: *)
-(* ||T|| The HELM team. *)
-(* ||A|| http://helm.cs.unibo.it *)
-(* \ / *)
-(* \ / This file is distributed under the terms of the *)
-(* v GNU General Public License Version 2 *)
-(* *)
-(**************************************************************************)
-
-set "baseuri" "cic:/matita/tests/fold".
-include "legacy/coq.ma".
-alias id "nat" = "cic:/Coq/Init/Datatypes/nat.ind#xpointer(1/1)".
-alias num (instance 0) = "natural number".
-alias symbol "eq" (instance 0) = "Coq's leibnitz's equality".
-alias symbol "plus" (instance 0) = "Coq's natural plus".
-theorem t: \forall x:nat. 0+x=x.
- intro.
- simplify in match (0+x) in \vdash (? ? % ?).
- fold simplify (0 + x) in \vdash (? ? % ?).
- reflexivity.
-qed.