...A function that converts the utility of things, energy, information, services, etc. into a numerical value. Consider a situation in which you are comparing the value, goodness, importance, preference, etc. of several objects. When you consider object x to be equal to or greater than object y, you say that you prefer x to y, and express this as x ≿ y. A preference relation is one that defines preferences for all possible pairs of two objects. For any three objects x, y, and z, if x ≿ y and y ≿ z, then the preference relation is said to satisfy the transitivity law. ... *Some of the terminology explanations that mention "basic utility function" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…物,エネルギー,情報,サービスなどの効用を数値におきかえる関数をいう。幾つかの対象について,その価値,良さ,重要さ,好みなどを比較している状況を考える。対象xが対象yと同等以上と考えるとき,xをyより選好するといい,x≿yと表す。可能なすべての二つの対象の組について選好を定めたものを選好関係という。 任意の三つの対象x,y,zについて,x≿yかつy≿zならば,x≿zであるとき,その選好関係は推移律を満たすという。… ※「基礎効用関数」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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