最終更新日：2023/08/19

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A number used to denote quantity; a counting number; a cardinal. / (mathematics) A generalized kind of number used to denote the size of a set, including infinite sets.

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cardinal number

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cardinal number

noun

A number used to denote quantity; a counting number; a cardinal. / (mathematics) A generalized kind of number used to denote the size of a set, including infinite sets.

I have three cats.

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意味（1）

A number used to denote quantity; a counting number; a cardinal.

The smallest cardinal numbers are 0, 1, 2, and 3.

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詳細

意味（2）

(mathematics) A generalized kind of number used to denote the size of a set, including infinite sets.

This cardinal number is the smallest of the infinite cardinal numbers; it is the one to which Cantor has appropriated the Hebrew Aleph with the suffix 0, to distinguish it from larger infinite cardinals. Thus the name of the smallest of infinite cardinals is ℵ₀.

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