1 (**************************************************************************)
4 (* ||A|| A project by Andrea Asperti *)
6 (* ||I|| Developers: *)
7 (* ||T|| The HELM team. *)
8 (* ||A|| http://helm.cs.unibo.it *)
10 (* \ / This file is distributed under the terms of the *)
11 (* v GNU General Public License Version 2 *)
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15 include "delayed_updating/syntax/prototerm_proper.ma".
16 include "delayed_updating/syntax/prototerm_constructors.ma".
18 (* PROPER CONDITION FOR PROTOTERM *******************************************)
20 (* Constructions with prototerm constructors ********************************)
22 lemma ppc_iref (t) (n):
24 #t #n #p * #q #Hq #H0 destruct //