Library Coq.Logic.RelationalChoice


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.