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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: Description.v 10170 2007-10-03 14:41:25Z herbelin $ i*)
(** This file provides a constructive form of definite description; it
allows to build functions from the proof of their existence in any
context; this is weaker than Church's iota operator *)
Require Import ChoiceFacts.
Set Implicit Arguments.
Axiom constructive_definite_description :
forall (A : Type) (P : A->Prop),
(exists! x, P x) -> { x : A | P x }.
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