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Envy-freeness is a criterion of fair division. An envy-free division is a division in which every partner feels that his allocated share is at least as good as any other share. == Definitions == A resource is divided among several partners such that every partner receives a share . Every partner has a subjective preference relation over different possible shares. The division is called ''envy-free'' if for all and : ::: If the preference of the agents are represented by a value functions , then this definition is equivalent to: ::: Put another way: we say that agent ''envies'' agent if prefers the piece of over his own piece, i.e.: ::: ::: A division is called envy-free if no agent envies another agent. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Envy-freeness」の詳細全文を読む スポンサード リンク
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