(* This program is free software; you can redistribute it and/or      *)
(* modify it under the terms of the GNU Lesser General Public License *)
(* as published by the Free Software Foundation; either version 2.1   *)
(* of the License, or (at your option) any later version.             *)
(*                                                                    *)
(* This program is distributed in the hope that it will be useful,    *)
(* but WITHOUT ANY WARRANTY; without even the implied warranty of     *)
(* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the      *)
(* GNU General Public License for more details.                       *)
(*                                                                    *)
(* You should have received a copy of the GNU Lesser General Public   *)
(* License along with this program; if not, write to the Free         *)
(* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA *)
(* 02110-1301 USA                                                     *)
Require Export Max.
(* lemmes concernant max *)
(* lemmes arithmétiques *)
(* lemmes sur les booléens *)
(* équations auxilliaires sur Neqb_1 *)
(* lemmes auxilliaires sur Neqb *)
(* récurrence bien fondée sur nat *)

Lemma indprinciple_nat_gen :
forall P : nat -> Prop,
(forall n : nat, (forall m : nat, m < n -> P m) -> P n) ->
forall n m : nat, m <= n -> P m.