Two axioms for the majority rule

Two axioms are shown to characterize the relative majority rule when preferences are defined over two alternatives. According to one axiom, if all the individuals in a group are indifferent, then the associated group preference is indifference. The second axiom states that a group S prefers alternative a to alternative b if and only if there is a subgroup T whose members unanimously prefer a to b and such that, if S ≠ T, indifference represents the preference of the group ST.