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(*         *   The Coq Proof Assistant / The Coq Development Team       *)
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(*         *     GNU Lesser General Public License Version 2.1          *)
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(** This file axiomatizes the relational form of the axiom of choice *)

Axiom relational_choice :
forall (A B : Type) (R : A->B->Prop),
(forall x : A, exists y : B, R x y) ->
exists R' : A->B->Prop,
subrelation R' R /\ forall x : A, exists! y : B, R' x y.