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 *)
13 (**************************************************************************)
15 (* Project started Tue Aug 22, 2006 ***************************************)
17 set "baseuri" "cic:/matita/LAMBDA-TYPES/Unified/P/defs".
21 - natural numbers : sorts h k, local references i j, lengths l
22 - boolean values : a b
23 - generic binding items: x
24 - generic flat items : y
25 - generic head items : z
29 include "../../RELATIONAL/Nat/defs.ma".
30 include "../../RELATIONAL/Bool/defs.ma".
32 inductive Bind: Set \def
38 inductive Flat: Set \def
43 inductive Head: Set \def
51 | head: Bool \to Head \to P \to P \to P