EntityQ2513496· pop 7· linked from 35 articleschoice functionSign in to savemathematical function f that is defined on some collection X of nonempty sets and assigns some element of each set S in that collection to S by f(S)ConnectionsInternational Standard Book NumberEntityfunctionEntitydigital object identifierEntityunionEntitycombinationEntitypower setEntityNicolas BourbakiEntityfinite setEntitybinomial coefficientEntityaxiom of choiceEntitycountable setEntitymathematical economicsEntityErnst ZermeloEntitywell-orderEntityPlanetMathEntityconverseEntitymultivalued functionEntitywell-ordering theoremEntityoptimal controlEntityfamily of setsEntityCategoriesAxiom of choiceBasic concepts in set theory