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diff --git a/theories7/Arith/Div.v b/theories7/Arith/Div.v
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-(************************************************************************)
-(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
-(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
-(*   \VV/  **************************************************************)
-(*    //   *      This file is distributed under the terms of the       *)
-(*         *       GNU Lesser General Public License Version 2.1        *)
-(************************************************************************)
-
-(*i $Id: Div.v,v 1.1.2.1 2004/07/16 19:31:23 herbelin Exp $ i*)
-
-(** Euclidean division *)
-
-V7only [Import nat_scope.].
-Open Local Scope nat_scope.
-
-Require Le.
-Require Euclid_def.
-Require Compare_dec.
-
-Implicit Variables Type n,a,b,q,r:nat.
-
-Fixpoint inf_dec [n:nat] : nat->bool :=
-      [m:nat] Cases n m of
-                  O     _     => true
-              | (S n')  O     => false
-              | (S n') (S m') => (inf_dec n' m')
-             end.
-
-Theorem div1 : (b:nat)(gt b O)->(a:nat)(diveucl a b).
-Realizer Fix div1 {div1/2: nat->nat->diveucl :=
-  [b,a]Cases a of
-         O     => (O,O)
-       | (S n) =>
-           let (q,r) = (div1 b n) in
-             if (le_gt_dec b (S r)) then ((S q),O)
-	     else (q,(S r))
-       end}.
-Program_all.
-Rewrite e.
-Replace b with (S r).
-Simpl.
-Elim plus_n_O; Auto with arith.
-Apply le_antisym; Auto with arith.
-Elim plus_n_Sm; Auto with arith.
-Qed.
-
-Theorem div2 : (b:nat)(gt b O)->(a:nat)(diveucl a b).
-Realizer Fix div1 {div1/2: nat->nat->diveucl :=
-  [b,a]Cases a of
-         O     => (O,O)
-       | (S n) =>
-           let (q,r) = (div1 b n) in
-             if (inf_dec b (S r)) :: :: { {(le b (S r))}+{(gt b (S r))} }
-             then ((S q),O)
-	     else (q,(S r))
-       end}.
-Program_all.
-Rewrite e.
-Replace b with (S r).
-Simpl.
-Elim plus_n_O; Auto with arith.
-Apply le_antisym; Auto with arith.
-Elim plus_n_Sm; Auto with arith.
-Qed.