(************************************************************************)
(*  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 	$Id$	 i*)
Section MapC.
Variables A B C : Type.

Lemma MapDelta_as_DomRestrBy_c :
forall m m':Map A,
mapcanon A m ->
mapcanon A m' ->
MapDelta A m m' =
MapDomRestrBy A A (MapMerge A m m') (MapDomRestrTo A A m m').