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-rw-r--r--theories/Logic/ClassicalDescription.v12
1 files changed, 4 insertions, 8 deletions
diff --git a/theories/Logic/ClassicalDescription.v b/theories/Logic/ClassicalDescription.v
index ad454a4d..2fd6e68e 100644
--- a/theories/Logic/ClassicalDescription.v
+++ b/theories/Logic/ClassicalDescription.v
@@ -1,13 +1,11 @@
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
-(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2011 *)
+(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2012 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
-(*i $Id: ClassicalDescription.v 14641 2011-11-06 11:59:10Z herbelin $ i*)
-
(** This file provides classical logic and definite description, which is
equivalent to providing classical logic and Church's iota operator *)
@@ -18,13 +16,11 @@
Set Implicit Arguments.
-Require Export Classical.
+Require Export Classical. (* Axiomatize classical reasoning *)
+Require Export Description. (* Axiomatize constructive form of Church's iota *)
Require Import ChoiceFacts.
-Notation Local inhabited A := A (only parsing).
-
-Axiom constructive_definite_description :
- forall (A : Type) (P : A->Prop), (exists! x : A, P x) -> { x : A | P x }.
+Local Notation inhabited A := A (only parsing).
(** The idea for the following proof comes from [ChicliPottierSimpson02] *)