index

索引

普通は本の末尾にあり、特定の話題や語がどこに出るかを示す一覧。

やさしい英語で： A list, usually at the end of a book, showing where to find particular subjects or words.

• Check the index for her name.
• The index lists every place mentioned in the book.
• Both books have detailed indexes.

使い方： an index of something (The book includes an index of names.)

よく使う表現： book index, alphabetical index, index entry

指数

物価や賃金などが時間とともにどう変わるかを示す数値。

やさしい英語で： A number showing how prices, wages, or similar amounts change over time.

• The price index rose again.
• The stock index fell by twenty points.
• This index tracks changes in wages.

類義語： indicator

よく使う表現： price index, stock index, consumer price index, market index

指数

数学の群の中で、部分群を移してできる異なる集合の数。

やさしい英語で： The number of distinct sets formed by shifting a smaller group within a mathematical group.

• This subgroup has index two.
• The index equals the number of cosets.
• Can this subgroup have an infinite index?

使い方： the index of A in B (The index of this subgroup in the larger group is two.)

よく使う表現： subgroup index, finite index, index of something

索引を付ける

文章や資料集の中で話題や語を探せるように、一覧を作る。

やさしい英語で： To make a list of subjects or words so people can find them in a text or collection.

• She will index the book.
• The archive indexed every document.
• Have you indexed the names yet?

類義語： catalogue, list

よく使う表現： index a book, index something alphabetically, index a document, index a text

物価に連動させる

購買力を保つため、支払額などが物価に合わせて変わるようにする。

やさしい英語で： To make payments or amounts change with prices, so they keep the same buying power.

• The government indexes pensions to inflation.
• Are these payments indexed to prices?
• They indexed wages to protect workers from rising costs.

使い方： index something to something (They index pensions to inflation.)

類義語： adjust for inflation

よく使う表現： index wages, index to inflation, index a pension